Not going to happen. The cost on the sleds is to much now let alone when you throw a $6000 turbo on it. Develop an engine to run it on, and make it run good with no lag and still be able to warranty it.
Yamaha said in a an interview "yes our sleds are built well and take turbos and superchargers well but we could not manufacture one and be able to warranty it; even tho our engines are very suitable for turbos and superchargers, you will not see a factory model."
They are making sleds user friendly, cheaper, and less failures. If you want a factory built turbo, talk to CMX, they will be offering one this year. Its about $36,000 for the top model so you might want to get a loan.