need 2 balances and bottom parts where sashes clip into

Thanks for posting! Can you please remove your balance from the window and take a few pictures of it from either end? I'd also like to see a few pictures of its shoe and the stamp printed on the metal channel. Once we have that information, we can work from there.

Thank you for the images! Now, it's hard to tell exactly what the pivot shoe is without detailed dimensions, but you might want to consider our 15-046. How does that match up?

As for the balance, check out our Series 765 channel balance. Carefully compare it to your existing hardware and let me know what you think.

Did you visit the page for the Series 765 channel balance? We show an image that details what you measure to get the length. You just need to measure the metal channel.