904 Transmission Stopped Going Into Gear

Duster Captain said
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I would like to replace but the problem is that I cant find anyone around town that has them.

Where should I be looking for these? Buying a used one that I know nothing about is the same as me re-using mine, so I would need to find a "new" one.....thoughts?

Every single local trans shop has access to new converters, as that business just can't be done without it.
What they want for one is what would concern me.
Maybe ask about rebuilding yours, and if that doesn't work do the best you can on a replacement.