It feels like I struck gold today. I stumbled upon a stockpile of Coleman Exponent stoves while on ebay. Thought I'd share as it seems like there are plenty to go around (10 or more Xtremes!).
I couldn't pass up grabbing an Xtreme when they are so hard to come by. Had to stop myself from buying a spare since I just got an Xpert a few weeks ago that I can now use for parts/etc.
Xtreme ($45 + shipping): http://cgi.ebay.com/Coleman-Exponent-Extreme-Stove-NEW-/170573489085?pt=LH_DefaultDomain_0&hash=item27b6f8e3bd
Xpert ($38 + shipping): http://cgi.ebay.com/Coleman-Exponent-Xpert-Backpacker-Camp-Stove-NEW-/170573389265?pt=LH_DefaultDomain_0&hash=item27b6f75dd1
Xpedition ($57 + shipping): http://cgi.ebay.com/Coleman-Exponent-Xpedition-Camp-Stove-NEW-/170573485580?pt=LH_DefaultDomain_0&hash=item27b6f8d60c
edit: Just found 1 other Xpert for ($25 + shipping)