Lowe's carries the regular version, but some stores are phasing it out. The Lowe's that still have it, carry the mini unit, which is a small batch unit that is easier to work with IMO. Find out if there are any tile suppliers in your area that carry the pro version, it is much easier to work with, and now comes in the mini unit as well.
I seem to recall someone mentioning internet availability as well. Read that thread I posted the link to, there may be mention of it there.