What top sash guide do I have?

A handy person from Seattle says:
I have the same sash guide as shown in the picture above, they came out of a Milgard window and the 18-188 is not compatible with it. The 18-188 is a little too thin and do not have the extended lip to catch the channel balance properly. I'm not sure where to find the correct replacement.
User submitted photos of a top sash guide.
Profile picture of Paul
Paul from SWISCO responded:
We have the 18-127 top sash guide, which has a 7/8" screw hole placement, and the extension to catch balances is 5/8". Now, your extension is 17/32", so do you think that would be too much, or could you get this to work?
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