Animal Plastics:
http://www.animalplastics.com/
Reptile Basics:
http://www.reptilebasics.com/reptile-rack-systems
Both are great
I would try to get one that uses IRIS tubs. IRIS very rarely changes the sizes of their tubs. The other big tub brands like to change their tub sizes every few years making replacement tubs hard to come by.
You will also need a good thermostat to control the flexwatt in the rack.
here are 2 good thermostats
The hydrofarm. this is the baseline, cheapest thermostat that is generally accepted as safe to use with BP's. They aren't very accurate and lack safety features so they should be replaced with a better thermostat when possible.
http://www.amazon.com/Hydrofarm-MTPR.../dp/B000NZZG3S
A much better thermostat is the herpstat. these cost more but are much better. They are very accurate and have multiple safety features built in.
http://spyderrobotics.com/
a temperature gun would also be a good thing to get. this way you can easily tell the surface temperatures ion your tubs.
any of these are fine:
http://www.reptilebasics.com/thermometers
You will of course need some sort of substrate. i suggest a paper based substrate such as newspaper or paper towels.
1 hide on the hot end will be sufficient, but having 2 is good (one on hot end, one on cool end)
I like these hides:
http://www.reptilebasics.com/hide-boxes
And finally a water dish. you want it to be heavy enough that it won't tip over.
I prefer ceramic dog bowels like this one:
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