Mischler's were very nice to deal with when I needed OEM parts for my K11LT a couple years ago. IIRC, I drove up and they did not have all the parts in stock so they had them drop shipped for a reasonable fee to save me the additional trip.
Considering they are BMW and HD, they seemed really nice, friendly, polite and respectful - even when they found out I was after parts for 20+ year old bike.