I don't know if Galt (a company who generally produces educational toys and activity sets for kids) has a US distributor or not, so I'm afraid I can't help there. I did just have a quick look on their website
, but they don't seem to ship outside of the UK, and apparently don't list this product anymore.
I figured that I should provide a photograph of the looms together, to show the size difference that I referred to;
That's my blue Darice loom on the right (am I correct in assuming that the blue Darice one is equivalent to the blue Knifty Knitter?), complete with my current work-in-progress still attached to it*, and the one from the Galt set on the left. The little cord-making loom is in the shot, as well - that one is about the size of a finger.
It doesn't show too well in the picture, but the pegs on the purple loom are smaller, and as noted before, are a bit closer together than they are on the blue Darice loom. The purple loom itself is just as well-built as the Darice ones (which surprised me a bit at first, seeing as the kit it came from was so low-priced - I was expecting something a lot flimsier!), although it doesn't have the notches on the base. The finger-sized loom is fairly thin, so I'd be a bit worried about putting too much pressure on the pegs.
*(I'll post about this project whenever it is that I get it finished. I'm working on it in between trying to finish off a long-delayed sewing project.