identify part

I sure can. Your exact pivot shoe actually isn't made anymore, but the good news is that our 15-177 works just as well and is compatible with all the same hardware. It should be an easy 1:1 replacement. The coil spring, meanwhile, is a match for our Series 152.

The cover is a little more complicated. Like the shoe, it's been unavailable for some time. However we sell a few components that are designed to work for modern applications of the Series 152. See our 15-143 bushing, 15-144 bushing cap, and 15-145 barrel. These three parts kind of "sandwich" over the spring, forming a cartridge that holds it securely in the track.

Let me know if you had any questions and I'd be happy to assist.