Herwith contact details for a source of piston rings.
I have used them and had a good service
Ring of Bells
Piston Rings
Phil Daintree
22 Hawkstone Road
Whitefield
Manchester
N45 7PJ
0161 766 4487
send sae
Phil Daintree
22 Hawkstone Road
Whitefield
Manchester N45 7PJ
Scott rings radial depth 0.110″ (check) x 1/16″ wide quote bore size
Kind Regards
Roger