Another option for those interested might be the transaxle from Alfa-Romeos.
Milanos (type75), Alfetta GT's and Alfetta Coupes use a transaxle with inboard brakes. The clutch assembly is located at the engine (front engine) in the bellhousing. These boxes, like the Porsche 928 box is long and fairly slender, but does not use a torque tube to connect the engine and gearbox (uses the chassis). These boxes may not be easy to find, but they are pretty strong.
Just another option to muddy the water.