Like I said before, these pumps were (to my understanding) aftermarket for ford vehicles so looking in the junkyard is going to be hard. I bought mine a year ago for like 50-60 bucks complete from advance. Then recently it died and I couldn't source a new one anywhere so I chose to get the AGR (really not happy with it in the week it's been installed). Since this thread came up I found I can still get the pump, luckily I saved my old one so I can piece together a new one with the parts.
I wish I could tell you where to get the parts but I looked for myself and wasn't able to find anything. Sorry this doesn't help but I guess keep looking in junkyards or online.
What don't you like about the AGR pump? I was considering getting one...