C28 bsi replacement

A quick learner from Oklahoma, US says:
We are attempting to replace the balances of 2 windows. They are marked C 28 BSI. We also need to replace the top sash guides, but cannot identify it. We believe the channel balance is a 2830. Here are pics of the balance and the sash guide that we are attempting to replace. Please let me know what other info helps. Thank you.
A customer submitted photo of a top sash guide.
User submitted picture of channel balances.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting! For your top sash guide, please take a look at our 18-156 Gapco top sash guide. Make sure to compare its dimensions to your own hardware.

As for the channel balance, please look at our S351-29 with the 2830 stamp option.
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