Need Part ID's for balances other parts

A quick learner says:
Hello, thanks for the reply. Here is my reply with pictures. However, I have taken a close look at the jamb liners, hooks, and balances. Here are my conclusions for these five double hung Marvin windows from circa 1988.

Jamb liners: Most of the jamb liners show wear (breakage, bending, cracking) at the top where the S hook attaches. The liners are 58 3/8 inch long x 3 3/4 inch wide not including the flexible vinyl on the outside.

Balances: These are 27 inch long x 9/16 inch wide. Inside the balance is a spring, cord, and a knife lock shoe. The shoe is colored blue. Appears to be a Ribbed Tilt Channel Balance. Could be exactly the same as your Series 751 that is in one of your videos.

Hook: S hook is 2 1/8 inch long x 1/4 inch wide

Sashes: Are wood and aluminum clad. They are 1 3/8 inch thick and have a V plow.

Main cause of the problems appears to be the wear on the tops of the jamb liners where the S hook won't stay up and handle the tension from the sashes. Most of the wear is on the channel for the lower sash.

I am quite handy and I am considering reinforcing the backside of the top of the existing jambliner with a metal strap glued to the jambliner so it can handle the tension from the weight of the sash.
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Emily from SWISCO responded:

Thanks for reaching out to us. I agree that our Series 751 appears to match what you have here. We also sell the 19-030 long S-clip. The bad news is that we can't help with the jamb liners since we don't sell replacements for them. Since this is a wood window, we recommend contacting a local millwork. They should be able to advise accordingly. I am sorry for the inconvenience. 

How to install a ribbed tilt channel balance with knife lock shoe
How to install a ribbed tilt channel balance with knife lock shoe
Classifying Channel Balance Fittings
Classifying Channel Balance Fittings
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