There is a Cheese plush available on eBay:
http://cgi.ebay.com/ws/eBayISAPI.dll...ADME:B:SS:US:1
Note the disturbingly high $100.00 price tag. The plushies of the four main characters (Bloo, Wilt, Coco, Eduardo) each go for about a quarter of that. Makes me kind of sad.