Top Sash Channel Balance Guide Replacement?

A home owner from Portland, Oregon says:
December 23, 2016
Hi all,

I'm repairing windows with missing parts, so I'm hoping you can help me identify a couple of parts. The pictures attached resemble the 18-008 guide, but I'm not 100%. They're 2-3/16" tall. I've ordered new balances through you guys and I have those, but this piece is broken on every window (and I'm frankly surprised I found one intact).

Are there any other guides in the sash channel that might need to be replaced? There are screws in the bottom end of the channel, but I haven't found anything (intact or otherwise) that would mount in this location.
User submitted photos of a top sash guide.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
January 4, 2017
Please see our 18-008, I believe this could be a good match for you.
5/8" Top Sash Guide
5/8" Top Sash Guide
18-008
$0.95
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