There are several alternatives. Scuba Fix (
www.scuba-fix.com) is one of them, though they are in Thailand and the part is extremely expensive.
Another alternative is a 3D printed flange. Much similar to the Scuba-Fix solution, but 3D printed. There are several people printing already and can be printed to fix that particular BCD.
Both solutions are much similar to the original 2 parts DGX flange usually installed in several tech bladders or the ScubaPro 2 parts flanges.
I do not agree with the statement :
I've 3D printed BCD flanges that has now more than 3 years working without any issue, also for dive schools where students are too cruel with dive gear.
I've heard too many times already that 3d Printed parts are not up to the task, It seems that original threads are also not up to the task, as this is a very frequent BCD fault, even with BCDs that have few years.
If the 3D printed part is correctly printed with the correct filament, the flange works and the BCD will survive.
Of course a new BCD will be much better, but also to a higher cost than a repair. Manufacturers will be glad, not you.