I just went through this. Bought a GMB from Amazon. Really nice casting, great price, good feel, all the holes and posts lined up with no issues.
This was after looking at Autozone's $59.99 HD unit, and both offerings they had at O'reilly (new and rebuilt).
I've got a Prime acct so the shipping was free and the unit was $34.99 but I see they're currently out of stock for the one sold by amazon themselves.
Same unit sells for $56 at Summit.
GMB 130-1320 OE Replacement Water Pump :...
edit: Nevermind - this is for the long pump. Take a look at GMB anyways.