I'd suggest haging around the locost forum and try to find someone on
there that has used a subaru engine. I'm sure that people have used
them in kit cars. Not sure if a Lotus/Caterham type replica car has
used one though, and most (but not all.) of the cars on locost are of
that style.

I had looked into the possibility of building a mid-engine car around
a subie powertrain and felt inspired by the thread below. It goes over
how to lock a diff so that you can use the tranny as either solely
rear drive, or solely front drive. Obviously if you use the tranny
solely as a front drive transmission, you can put the powerplant and
transmission in the rear and use it as a transaxle. It makes for a
long powertrain, but if you build the frame to accomodate that, you're
fine. It has a nice low CG, but exhaust routing can be a pain if you
want to mount the engine really low.

http://www.clubwrx.net/forums/powertrain/27532-converting-awd-2wd-rwd-w-pics.html

Good luck. I also was in an accident recently. But my miata was not
totalled, it is all cosmetic and still driveable, and I'm going to be
able to fix it. I just need to convince the other insurance company to
give me the money.