I'll have someone swap thermostats first, I wen't to take the thermo housing off, 2 of the 3 bolts are Absolutely tough to get to, 1 bolt does not want to turn, so I'd rather let a mechanic do this job properly before I screw up and mess up the bolt head. I found the prices for water pumps.
Laso--$152.82
Hepu-$151.00
Graf--$124.90 free shipping on either brand

What would be a reliable brand