I know they do/did for a 440 based 4.15 stroke 493. Mine are IIRC 34cc.
When I ordered my kit, Ross was the supplier for 440Source and that dish was a custom order. There were enough orders after mine that they became a shelf stocking piston and they (Ross) were so late delivering my pistons that I got a rebate on the custom upcharge. Don't know if they are still a shelf stock or not.
With zero deck and 84 CC RPM's my CR measured 8.97:1.
