Crosley windows

Hello;

I need some parts for Crosley single hung windows. The aluminum Channels has a nylon part on each end. The one on the bottom is called a Channel Balance shoe Part #15-008. Don't know what the one on top is called, it has a metal covering on top. Both seem to have been 1-1/2" wide.

I bought the bottom one from you a couple years ago but don't see it now. Thank you Don