Okay. As I alluded to, Pete and Steve have backed away from providing kits and doing all the hard work to concentrate on their own projects. EDIT - see Pete's comment!!
Others on the forum elsewhere in the country may chip in with suggestions too. Generally, the task is a DIY one, based on sourcing the required parts and having them modified to suit. In my case, I bought an S14a box off eBay for £150 (I was very lucky price-wise, especially as it is in good condition), had a prop shortened by a specialist local to me in Cheshire for £60, and was able to get a pre-modified bellhousing from Pete a while back when they were still doing them (trading a stock Z one as a core), along with him modding a crossmember for me. I need a couple more bits and will finally get around to an install soon down at a friend's garage nearby.
I guess it all depends on how much effort you are willing to devote to the exercise as opposed to trying to hand it off to a single third party. Good luck anyway!
The details of the bellhousing conversion are out there on the web - it's finding somewhere competent to do it correctly so that it fits.