JB Champion Repair: New Komfit vs 1960's JB Champion

This is a shot in the dark, but does anyone know if any of the parts on the new Forstner Komfit are the same or close enough in tolerance to a 1960's band. In particular, this question applies to the small spring on a straight-end 16/19mm JB Champion, the one that flexes the variable ends. The spring on my original broke and I'm willing to swap the busted one out for a new Komfit one (it's all I've got). I was surprised how easy it was to remove the end and discover the problem (using a thumbnail actually). The spring has a loop on each end (well, a good spring); those loops attach to those small posts on opposite each other on the ends (left and right). I just need the right spring to put back over those posts and then button up the end.

Thanks, Jennison

Thank you. You’re on the button in terms of this being proprietary. Understandably, Forstner was tight-lipped when I asked them.