Seems like the only real solution is the one Iansoutham describes.

I have put Deflex bushes in the TCA but you can hardly get the TCA back in the subframe because the bushes are about 2 millimeter wider than the orginal bush. So with a lot of swearing and grease I managed to get them in...

I think I will have to get them out again and try to flatten the PU bush so that the can fit on an easy way. Does this sound familiar and can it be done to a PU bush?