The proportional tstats like a helix runs 135.00, a herpstat runs for about 109.00. These are nice because they constantly adjust the level of power output rather than just turn the power on and off like other tstats. Kinda like an automatic rheostat per se. You just set it and forget it. You can find a herpstat here: www.spyderrobotics.com

Johnson Controls or Ranco makes easy to use on/off tstat, and cost around 60-70 each depending on where you get them.

Flexwatt heat tape is probably easiet to find online, as well as the tstats. I wouldn't try to find them locally and then have to pay retail prices.