Just saw this on RC Groups posted by Frank:

Frank Bowman is selling the Bowman's Rings Business to Bjorn Baal.
He has been training Bjorn how to make make Piston Rings just
like Frank made them.
Bjorn will soon be ready to start selling the rings he has made.
We just wanted to give the R/C & C/L flyers a heads up, that you can soon start buying
Piston rings again.
Bjorn's email: rmjmachineworx@gmail.com

Yes outstanding news. When up and running..PLEASE let us know!