1/2 channel balance replacement

Good morning,
I am looking to replace the channel balances on 8 windows in my home. (16 total replacement pieces). It appears from measurements that it is 1/2 inch and 28 in length. I am struggling with the correct shoe and and top. Can you advise please. I live in the central valley of California and my house was built in 1994 with black frame dual pane windows. We just had a energy efficiency test and the inspector told us that our windows are in good with energy efficiency but as you can see from my pictures the channel balances have seen better days. Thank you in advance.