The model # of the carb is WT - 263
The ebay number I provided to Rich ( Ebay # 160262090004) is an auction for that carb. I originally found a post that was asking for a carb for a Homelite 25 cc and it gave a number to this guys auction and store.
The intake spacer throat has to be modified as this carb has a larger throat diameter than the stock carb but it is not hard to do.
As for the link to the no nitro fuel, here ya go........

http://www.rcuniverse.com/forum/m_7580969/tm.htm

Mark