2005 Thermostat

[HUM GOOD]

I own a 2005 H2. My mods have been:
-K&N cool air intake
-Diablo Tuner
-Borla headers and cat back duals
I was told it is stock with a 185 degree thermostat. It still runs at 210 degree. I looked into hypertech 160. I was informed they presently don not have a fit for the 2005 water pump.
Looking for ideas to drop the temp. Truck runs much crisper before warming up.
Thanks in advance for any insights.

Happy Hummin!