Some of the Conversion Parts Vendors you have listed sell complete kits as well. KTA's5 Conversion Kits for Vehicles from 500 to 5000 lbs. total weight.
Figured I'd link the 2 threads for anyone looking.
Mike and Shari at Electro I think may have the record for doing this the longest http://www.electroauto.com/ They offer full DC or AC kits for VW Rabbits, Porsche 914s, Chevy Sprint/Metros , Chevy S10s and also universal kits. They have a big database of patterns built up so they can custom machine an motor adapter for many vehicles without even needing your transmission. I bought their deluxe universal kit from them.
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