I just rebuilt an 8 ba pump. I wanted to do it my self for the experience. Cost of the parts for one pump was $30 + shipping. I'd say from start to finish; disassembly, media blast, replace parts was about 45 - 60 minutes.
They were not hard to do, you do need access to a press and a few shop tools. So for $70 + an afternoon in the shop you could do it your self.
I'll bet someone in the Early Ford V8 club in your area can help???
www.efv8.org