Re: The Deves ring question on your other thread, I used them for some years in a SCCA H Production Sprite (948cc) with very good results.
That said, consider sourcing rings from companies such as Sealed Power/Speed Pro, Hastings, TRW, etc. By entering their listings for bore dimension and ring width, you may be able to find appropriate part #s.
Rings can be purchased separately by type, i.e., compression in the correct bore and width as one part #, and oil as another part #. They do not have to be purchased as application specific sets.