65 904 Torque converter

So I think I have torque converter problems with my 65 dart gt /6. I did a quick trans rebuild and it still wont move in first or reverse. Im thinking torque converter got trashed with all the clutch shavings. So Im looking at the parts stores/ rock auto/ebay etc and Im haveing trouble finding one. Just need a stock replacement. has anyone else had trouble finding one and what was the solution.