Caradco (?) window spring balances

I believe these springs are for Caradco windows, though there is no label on any part, nor the windows, which were likely installed when the house was built in 1979. In checking, I am unable to identify a color on the bottom of any of the springs, thus I am sending the glass size of this window (and nine others.) I do not need to replace many of the springs, and in some cases, just the pin is broken off or the plastic tube is damaged or missing. As I consider options, I wanted to find out if it is even possible to recreate these springs, and the cost.

Window glass size: 20" x 28", both upper and lower
Lower springs:
Total length=24-3/4"; Tube length=22-1/2"; Bottom Pin=3/4"; Top attachment=1-1/2"
Upper springs:
Total length=22-3/4"; Tube length=20-1/2"; Bottom Pin=3/4"; Top attachment=1-1/2"
[note: top attachment of upper spring has the movable piece shown in photo 0085, the purpose of which I do not know]
Please let me know if you need additional information. Thank you.

Paul,
So much for my misguided internet search! Thank you for correctly identifying the brand of window. I will search for a Wenco parts dealer, though since I may in the future replace the single panes if it is too much trouble, I might simply swap out balances that have the tube or plastic tilt tips broken and put them on windows we rarely open. Thank you again.