I purchased the M3 strut tower brace kit for 128i/135i's from HPA.
http://www.hpashop.com/BMW-128i-135i...tbrace-e82.htm
I'm hoping that it should be ok as I believe it comes with the modified centre mount.
Thanks for all the comments guys. A couple people have told me they used a breaker bar to loosen up the bolt so I might need to go and buy one of those and have a second crack at it. If all else fails, Peter I'm sure you'll see me again soon haha (I was guy that dropped by yesterday with the AW 135i)