Daniel - A little web snooping shows Rock Auto currently offering a few different standard sized 228 ring sets as in stock.

I did find a couple of supposed NORS (New Old Replacement Stock) sets offered on eBay, but haven't taken the time to double check/confirm they are actually compatible with your 228.

Hope this is helpful info. smile

~ Dan
1951 Chevy 3 window 3100
Follow this story in the DITY Gallery
"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)