TPMS second set?

Picked up a set of wheels. Now I need a TPMS set. I want to run two sets of wheels and tires. 1 summer and 1 winter. I see the factory sensors are about $100 each. What is everyone running? If you got them cheaper, where and what did you get?

 

They are cheaper with select dealers right now that are participating in the Toyota black friday sale. I thought about it but at like $70 each, that is a luxury I don't require at this time since I plan on using up my OEM falkens (which shouldn't take too long).

 

I too run two sets for the same reason. I only got a second set of TPMS because they came in the tires. Tirerack should sell them.

 

I think they're like $42 from tirerack

 

Ya, I just checked my tire pressure manually like it’s 1995. I don’t need my truck to tell me

 

I live on CO so it changes hourly anyways

 

Has anyone tried these sensors?
https://www.tpms.com/Toyota-Tundra-Upro-TPMS-Sensor-Set-p/uprot17rset-toyota-tundra.htm
At a quarter of the price over the OEM's from Toyota they are well worth it if they work.