UPDATE: Thanks Clive for the advice and offer of help! (I may have to take you up on that!) I have spoken to BBA-Reman and giving them my part no. so just waiting to hear back from them to see if they have a compatible unit in stock that I can buy. If not i may have to go down the road of taking mine off to send to them but I will cross that bridge when I come to it! So far BBA have been very helpful so I am hoping for a good result!
Can't believe how common this problem is reading through all the posts!