For anyone looking at using the inexpensive cone filters that are typically found on ebay for $19-29 each, they can be purchased from Speedmoto.com for just $10 each.
The stock carb uses the 57mm ID size, and if you have a 36 or 38mm VM carb then you need a 62mm ID size.
If you do not see the specific size you want listed at the time you go to their website then email them and thell them what you need. They are pretty good about taking care of business, do not overcharge for shipping and are trustworthy. I have never had a problem with them.
If you want a K&N for the stock carb, you might try this one...
http://www.4filters.com/Universal-Rubber-Filter-2-14FLG-3-12B-2T-4H_p_3-2769....It is only $28.99 for a small cone that will fit in the small space we have on a stock bike.
The price on the cones that fit the VM carbs is double of this one, why I don't know but that's the way it is.