Actually, when I left ATI (and admitedly last checked their site) last December, you could order all three versions of the RW directly from their web site. They should be listed in the Accessories section of their online store.
Remote Wonder Plus (actually the simplest and cheapest to manufacture):
[Link: shop.ati.com]Remote Wonder II (the most expensive by a WIDE margin to make, but has awful buttons):
[Link: shop.ati.com]Remote Wonder (Original)
[Link: shop.ati.com]All three work with Windows PCs and Mac OS X - The Mac software is light-years ahead of the included Windows software, almost worth considering switching to a Mac to use. ;) Ok, I designed the Mac software so I'm biased.
Bruno
Twisted Melon - Fine Software for Mac OS