I bought new G-Force last summer for that very same reason, they are one of the few who does recertify, like Stroud.
I pulled this off google, something i did not know.
RECERTIFICATION
Recertify your SRP belts for $50.00. We will not recertify belts with hardware that is rusted or damaged to where we believe it will no longer operate properly. ( SFI -rules, state that a manufacture can only recertify there own belts.) SRP does offer a trade-in program. Bring in your non SRP belts for trade for a new set of SRP belts, for any type of belts you want.
I didn't know the SFI rule.
Zip.