I've seen the carb on Ebay & it's cheap if you get it for a tenner. Why don't you email the vendor, tell them you're not sure what adaptor you need & could they send you the link for the part you need from the Malossi website?
You know those Malossi carbs are a race carb with nowhere to connect up your two stroke tube so you'll have to premix the oil & petrol together which can be a bit messy.
Steo
November 2009