Andersen Sash Balance Replacement

A handy person from Saltsburg pa says:
What would the crossover number for me to find replacements for window slash balances numbered d147p27674, c185p23275, and u197p27575. Thank you.
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Tom from SWISCO responded:
It's hard to tell without seeing the stamp. In most cases, the way the numbers are printed is just as important as the numbers themselves. However I believe the key stamps here are "7p27," "5p23," and "7[27" again. I would recommend our 24-737 for the "7p27" stamps and our 24-531 for the "5p23" stamp.
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