First gen Getrag
 

So I have all the stuff to fix - and keep fixed - my speedometer, but the actual gear housing on the transmission is stripped. Soooo- where can I get one? I've spent a while looking, but the only ones to be found are all on the automatics. Any ideas on where to get one for a Getrag? Or, better yet, are all Dodge's the same? I know I'm not that lucky and there is not a Getrag in any yard around here to steal from.
Any ideas?

Cree