Well here's some interesting news. Stopped by my local Stihl dealer today because a Stihl engine I have uses a Mahle cylinder (42mm bore). The Stihl 026 has a 44mm bore. But at $48 for two rings I just couldn't do it. After doing some "Auction Site" searching, I found a new pair of rings for $20.50. They look to be a "Pinned" type like the ones on the motor I have. I guess we'll see when they get here.