New member, bought a 1987 D50 that was garage kept for 30 yrs

[Georgethepainter]

I recently picked up this rust free/garage kept and unmodified 1987 D50 with a wasted G63B and a five speed. I was hoping it was just a bad starter but unfortunately it was a bad bottom end due to the counter balance belt breaking and the oil pump stopping. It’s a mess see photo.
I am currently looking for a good used motor (G63B) to install. This is my only transportation and need to move forward quickly. I have been searching my area (Southern West Virginia) and come up empty. Any help in finding a motor is greatly appreciated. Thanks in advance “GTP”