Replacement non tilt channel balance

A quick learner from Fort Myers, Fl says:
Need replacement for 2 Windows. Existing balance is 19" long 1/2" wide. Number on balance is 28C USB.

Need replacement for 1 larger window. Existing balance is 19" long 1/2" wide. Number on balance is 28F USB.

Can you match replacement parts for me?

Dan
User submitted photos of a window balance.
A quick learner from Fort Myers, Fl says:
The small window is 22" W x 28" H AND WEIGHS 20.4 pounds.

The larger window is 48" W x 28" AND WEIGHS 44 POUNDS
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Paul from SWISCO responded:
See our Series 380 channel balance. This comes with the 19-005 top and 15-005 bottom, so as long as these match up I think you should be okay.
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