The defender was relaesed from Rotherham in the Summer after failing to play towards the end of his contract due to injury. He has been without a club and has trained at Preston over the past couple of months having played for Westley at Stevenage.
Foster has agreed non-contract terms meaning that he is more than likely going to fill in over the busy festive period in order to see if he can get himself a deal.
He played in last night's JPT game at Bury and could be needed again with Candell-Sherriff being ruled out for two games after picking up a red card in last night's match.