Looking for BSI foot. Maybe

I am working on a home where many of the windows had issues, so the owner cut the strings in the balance channels so they could open the windows. They discarded the channel balance feet. The channels are all stamped BSI.

Of course, I want to do the repair as economically as possible. (Don't know if I can swing $300+ to replace all the channels. I THINK I could re-string these if I could find the appropriate feet.

If you COULD find compatible feet, that would be wonderful. If that would happen, I am also looking for 4 of the

metalic

window bottoms attachments. They are three inches long and I included a photo above

I would need 6 tops (see above pic)

I need 4 tilt latches. These are stamped with part number 5.139.291

I have a total of 16 windows that need repair. That comes out to 32 channels. So 32 feet ...oh please!

In case I can't find just the feet, here is the breakdown:

12 34 inch channels

14 28 inch channels

6 16 inch channels

Have a great Monday!

Terry