Looking for a engine for a 1985 Dodge D50

I am in NC and trying to find an engine or head for a 1985 G63B engine for my Dodge D50. Not having a lot of success in finding one. Like my truck and it is in great shape except for needing to rebuild or replace the engine.
Any ideas or help on finding one is appreciated or an engine that is compatible for a swap. It is a manual transmission.

thanks

Not sure if this is much help but I think Auto Zone or Oreilly's will have them. I have an 88 and they have mine but it is high and they will have to order it.