If I remember right your trans is the same as the one VW used (you did know that in Germany your car was marketed as a VW didn't you?) in the vans and an odd model that didn't sell much in this country (411 I think?) I would suggest you look into the off road world, you know, sand rails, dune buggies, baja stuff. Probably find some ads in the off road magazines. There are a number of shops making HD VW transmissions for the racing crowd, and probably already have kits or complete assemblies that will bolt right in.