HB,
SBT=Super Bait Tank. It's manufactured by Ron Vest in North Carolina. A little pricey, but a couple of the guides said it had the best filtration system and was the best shad tank on the market. From my experience, I'll have to agree. Ron has no website but here is link to the instructions that come with the tank, includes contact info and prices:
http://home.comcast.net/~tnangler/Su...structions.pdf
By the way, Ron Vest was great guy to deal with, took the time to answer all my questions, returned my calls, and lots of good advice!