This doesn't answer your question directly, but as an alternative to a replacement 968 engine, there's a company called Boost Brothers Garage that makes a conversion kit to allow a direct drop-in of an 07K VW 2.5 liter inline 5. Believe it or not, this engine is actually shorter and slightly lighter than the stock 968 engine, and if desired, in turbo form, can easily and reliably produce 400+ hp. Plus it doesn't have the 968's annoying balance shaft belts, is available for a few hundred dollars, and makes a really unique sound. If I hadn't sold my 968, I would have gone with this swap.