I was in need of a new rear tire for my 75RD350. I was worried about getting a matching Avon as they were unobtainable. Summit Racing had both front and rear AM26 MKII in stock. I got a rear shipped for $159.
Looking for a 110x80 and a 130x70-18
No one seems to have those sizes yet.
I will check them out to see if they do.