I would use nothing but a rebuilt pump from the factory. Maybe the ones from Fastlane are - don't know. Heard of too many folks who used an aftermarket pump have overheating problems because the impellers don't have the same clearance as the originals and don't move the coolant like they should. A rebuilt from the factory should not be any more than you mentioned, but of course, it's been awhile since I bought one.

Len