I agree, you should make your own. If you aren't very wood savvy/handy, you could look into a second-hand store or craigslist for a bookshelf to use as the rack. Then get 3" flexwatt heat tape, thermostats, etc. to line the shelves (I suggest buying from Big Apple Pet Supply), and then buying size/age appropriate plastic tubs. I use 12 qt for juveniles and 16 qt for a single adult gecko or breeding pair. I also use 32 qt. for my spoiled male.
As far as premade racks, I've heard animal plastics or Plastic Reptile Cages, Tanks and Racks. Snake, arboreal, lizard and turtle light weight custom flexwatt heated enclosures. are the way to go.