No, I am not familiar with that dealer. You can try posting in the inquiries section of arachnoboards. That 20 gallon tank might be kind of big for your vulpinus, though. I can't really tell from the pictures, but I am going to guess it is around 2" across? A large kritter keeper is plenty big enough if that is the case. Figure 1.5 time the legspan for distance between the lid and substrate, 2 to 3 times the legspan for container width, and 3 times the legspan or a little more for length of the container. (This is just for terrestrials) So a 4" tarantula could be housed in a container that is 8-12 inches wide, 12 to 18 inches long, and has 12 inches deep with six inches of substrate. For deep burrowers and arboreals, people often turn tanks on their side to allow more height or burrowing depth.