Try Verne Schumann. I purchased a set of +040 272 pistons from him last year. That particular set was manufactured by Badger and finished weighing in at 704 grams each with the pin after match balancing. Total variance in the new set was 2 grams before balancing. The original piston weight for the 272 I was rebuilding was 693 grams (with pin) so the new piston weight was in line with this when taking the oversize into account.
Schumann’s Sales and Service, ph:563-381-2416