Replacements.

I was hoping to just replace the pivot shoe. The coil springs seem to be fine in all the windows I need to fix. My issue is the cam locks are broken in a majority of them. I've searched for an exact replacement but have not had any luck. You have any suggestions for a part on your site that would work with the coil spring I have or a suggestion on an entire new spring/shoe. The spring that is pictured is a 7lb