As reported by The Daily Record, Rangers have failed with two bids for Brighton & Hove Albion defender Connor Goldson over the last week.It's clear that the 25-year-old is wanted by the Ibrox outfit, with defensive reinforcements needed if they are to compete with Celtic for the silverware in Scottish football next season following their double treble.The Light Blues conceded more goals than every other side in the Scottish Premiership's top six in 2017/18, which was especially disappointing considering they scored more goals than any other team, including the Hoops.If they can sort out that leaky defensive line then it'll go a long way towards showing improvement under new manager Steven Gerrard.With two bids rejected though, other options must now be considered should an agreement with the Premier League side become impossible.Here are THREE alternative centre-back options that could do a job for Rangers next season...James Collins has played his last game for West Ham United after the expiration of his contract at the London Stadium. Spending ten seasons at the club in two spells, Collins is a favourite with supporters and gave 100% commitment to the club right until the very end, helping them avoid relegation in 2017/18.A 51-cap international with Wales who has played in the Premier League in every season since 2005/06, he would offer Rangers immense experience and leadership, perhaps following in the footsteps of the likes of David Weir and Clint Hill.His average of 9.1 clearances a game in the English top-flight last season was more than any other player in the division, as collated by WhoScored, demonstrating a no nonsense style that could be a big hit in a team that is crying out for defensive ruthlessness.At 34 years of age, he doesn't have massive long-term potential, but as a problem solver on a season-by-season basis, he could prove be a shrewd signing by Steven Gerrard this summer.Another hugely experienced option available on a free transfer this summer is Aston Villa's John Terry. After his surprise move to Birmingham from Chelsea last summer, Terry was a massive part of the side that almost clinched promotion from the English Championship in 2017/18, but will not be at the club next season.His departure was announced on Wednesday, with financial reasons stated by the club for not renewing his contract as Villa are under pressure to comply with financial fair play regulations.Terry would of course command high wages should he decide he wants to play somewhere else, but perhaps linking up with his former England teammate Steven Gerrard would prove appealing.The Chelsea legend has achieved pretty much everything in club football and despite now being 37-years-old, he could be another short-term option to come in and forge a way forward for the Rangers defence.If Rangers don't want to go down the more experienced route and would prefer to bring in a young centre-back with plenty of potential, they could do a lot worse than considering Aberdeen stand-out Scott McKenna for a transfer.The Scotland international has been one of the division's best over the last year, nominated for the Scottish PFA Young Player of the Year award in 2017/18.A captain of the Scottish U21s side when not selected for the senior squad, the 21-year-old also hit headlines with his stunner of a strike against Kilmarnock in January, winning the division's goal of the season award this week.

Having recently signed a new long-term contract at Aberdeen, Rangers may find it difficult to convince the Dons to part with one of their prize assets, but the lure of the Light Blues is strong and there's no doubting a move to Ibrox could advance the player's career.

Outside of Celtic, there aren't many better prospects in Scottish football right now and the Gers should be making an effort to bring the best young Scottish players to the club, building for the future.