Indeed, though Subaru Gears does have adapters for a VW Type IV:
Subarugears
I'd like to convince them that there is a market for a Porsche motor adapter, but I fear the Porsche community is a little too precious about putting non-Porsche stuff in their cars, even though nobody has called the transmission the "heart" and "soul" of a car.
It is also worth noting that there is an adapter for the Chevy LS as well.