I think Coley on here modded his beam to take the diff without a fitting kit and he did have a spare cover for sale.

I am trying to get my 6 degree beam off MK now and it should take the supra diff without the kit. If it does then my fitting kit is off to Australia for Aussie Cossie.

It is only the rear covers that MT doesn't want to make anymore. I think the reluctance to make is the cost and sale price which indicates to me that if you are prepared to allow him a profit then maybe MT might do more?