Sorry to hear about that....
Here is some advice.... go to polaris and enter the VIN #s, mail pics of the sleds to all the club presidents in your state with a short note asking them to post it at their local shops, not just the polaris shops, on the note have your police department that took the report listed with their phone number, and case number. Ask the club presidents to mention it at their next club meeting.
Keep in mind they may attempt to part them out, so be specific on the description of the sleds.
I have not had this happen to me but a friend of mine had his stolen a few years ago. I am a police officer and recommend doing what I mentioned above at the minimum. It will be blind luck for a cop to find them without a tip from somebody. GOOD LUCK !