Cummins 6BT adaptor plate CAD designs

[Blackhawk]

I was wondering if there are any freely available CAD Design files for an adaptor plate which connects a Cummins 6bt to a 5speed manual transmission (FS5R50A) ?

Also perhaps any freely available designs for the engine mounts ? Probably made from mild steel with rubber isolators...

The planned swap concept is from a manual ZD30 to a 6bt using the same transmission.

Adaptor plate to be made from 25mm thick 6061-T6 Aluminum, I believe this is the best option ?

Dowels/alignment pins to be made from hardened steel (4140/4340 steel) heat treated to Rockwell C 50-55.

Hopefully someone has made these designs freely available.