Where to buy a new thermostat?

My old Johnson Controls thermostat has given up the ghost. I need immediate recommendations on what and where to buy. Is Helix out of business?

A Spyder Herpstat.

https://spyderrobotics.com/

Reptile basics has good ones. Amazon does have some decent ones but really all depends on your watt needs and other various factors.

I also recommend Herpstat. Been using them for 20 years!