Total seals are sold in all sizes. They are not file to fit.
Total seal 285 bucks
Hastings 35 bucks may make 4 hp less than the total seal rings. Depending on application.
Buy the correct size rings and check the gap they should be with in spec. If out of spec have the bors measured again.
File to fit rings are for high compression and racing or odd bore sizes. But not really the best idea for regular build usally something for engine builder to adjust if need be.