I acquired an old Power Products push mower for free and found it to have good spark, so I set about freeing up the rings and unfortunately cracked one. It has great compression even with the broken one installed, so I wanted to reach out here to see if anyone knew where to find parts for such an old piece. My only other idea was finding a way to weld and grind down the old ring but that would be tedious and probably only short a term fix. Id like to have it running along side my 1952 Clinton next summer. Thanks for any input!