Power steering pumps

So, mine puked its guts the other night. Not exactly sure where, but i suspect the seal between the reservoir and pump itself. However, having never rebuilt a power steering pump before, i planned to grab a reman at the parts store.

Its a late saginaw pump. I think its from an 80s diplomat based upon very fizzy memories of junkyard diving in the late 90s. It looks like an 80s chevy truck pump, complete with press on pully.

Anyway, flaps doesn't seem to have a reman, just a $300 new lares. I can get a reman from rockauto for $75 or so.

Is there any difference between mopar later saginaw pumps from the 70s-80s? Is there another pump i should consider? Can the gm stuff fit the mopar brackets to where i could do a remote reservoir pump?

Thanks yall. Currently doing other repairs and maintenance on the car, but this is rapidly approaching the top of the list so i need to get parts ordered.