Not sure if this is the best place to post this so feel free to move it.
Surdyke in Osage Beach, MO discounts all KTM parts (OEM and KTM PowerParts) -20% with free shipping!
http://www.surdykeyamaha.com/The parts finder works well and the pricing is the best I have found but I have yet to place an order so level of service and inventory are unknown.
Most of the items on my list would be special orders anyway, so not a big difference who they are ordered from.
Another shop that has good pricing is Munn Racing in Elm Mott, Tx and they are known for their inventory and service. As a comparison when I looked, KTMTwins charges list.
Also provides some leverage for those wanting to buy from a local dealer, in my case they will match the discount so the difference would be the +10% local sales tax charged here.
Bruce