http://www.cornelsworld.com carries T-stats too good ones at that. I have also had no problems with ordering herpstats from spiderrobotics the manufacturer.

Accurites are not easy it get here at all. The model most use has also been discontinued by the manufacturer (no longer on the web site) and in my experience is no better than any other. if you want a dual try exo terra it is as good (or as bad) as the rest. Flukers also make a non probe one that is ok as well.

Or...

http://www.ebay.ca/itm/Digital-LCD-F...ht_4273wt_1058

and a analogue hygrometer that is calibrate-able like this one it is accurate (as good or better than cheap digital ones) and less problematic with dust and dirt. It can be re calibrated if it starts to read in correctly.

http://www.amazon.ca/Western-Digital.../dp/B005WKBKSO