I know I asked him last ReaperCon (or the one two years ago) where he got his but I forget. If I remember right the one he used was around the size of a deck of cards?
I swapped from using flower-style porcelain round palettes to this after seeing his and and seeing someone else with this exact model:
http://www.cheapjoes.com/art-supply/CJ15350_8029_cheap-joes-rectangular-well-porcelain-palette.asp
Ordered several along with a couple other local painters so it was cheaper, and I really, really like it, as I can put my brushes in the side holder while I use them and have 28 wells for paint. If you go to hot-lead.org there's an "Email Me" link at the bottom of the page, but I don't know how often he checks that. He's also pretty active on the Reaper boards as Hot Lead, so you can PM him there, or look for his CMON handle as well. Laszlo couldn't be a nicer or friendlier guy so I'm sure he'll get back to you as soon as he can, though I think he'll be down here in TX next week for a Con, so not sure how busy he might be currently.
Oh, and a quick edit, when I got the palettes from Cheap Joe's it was the first time I'd ordered from them, and when one of the palettes broke in shipping through no fault of the packaging (very well packaged, but the box took a beating at some point) they were very fast and friendly while sending out a replacement. I've used Dick Blick a lot in the past, and they were every bit as good. Not sure about anyone else who might've ordered from them, and haven't found the same thing for cheaper elsewhere, though I haven't bought a new palette since getting the one I linked to above.
