If you need a side stand switch, try Partshark.com they have it listed in electrical#1 for $30.00. It is a good source for parts, I use them a lot for parts.
You are going to have to come up and fish the Cheat river, they are stocking it with 20" trout. I am going up to do some fishing with my brother and nephews next week, and maybe shoot the new SR 40 I just got.
Yes it will work with the bracket from Carbon One. I have two Stebles on mine. I made brackets and located them just below and behind the Passenger floorboards.
I run the E-3s on my RSV and like them a lot. I get good mileage and they handle good in the twisties and rain. I get them from Jake Wilson.com. Free shipping and fast delivery.
J & M is a great place to get headsets. I bought mine about five years ago and when they quit working or got a short in them I was able to send them back for repair or replacement. Good folks to deal with.
I have never tried Avons but I don't think the cold weather has anything to do with them cracking. A friend had three sets replaced from Southwest motor sports in one year and he lives in Arizona.