904 transmission pump issues

Hoping you can help me. I just rebuilt my 904 that was in my 65 Dodge Dart twice( after the first time I got a little over excited at having it on the road for the first time in 3 years and smoked the clutches). So we put in new clutches and re installed it. Now I have no gears whatsoever. Think it's the pump so I'm looking to buy a new/reman one or a rebuild kit for the pump. Any ideas on where I can get one? I've looked online and can't find anything. Thanks