help me identify the balance and the guide

A quick learner says:
Please help me identify the channel balance and the top sash guide I need to order. The top sash guides are 2 inches long. The channel balance have the number 2740 stamped on it. Pictures 1 & 2 are of the top sash guides, pictures 3 & 4 are for the balance tops, and pictures 5 & 6 are pictures of the balance shoes.

Thank you.
Customer image of their top sash guide
Customer image of their channel sash support balance
Profile picture of Paul Sr.
Paul Sr. from SWISCO responded:
The balance looks like our Series 390-28 (2740). The top sash guide I don't recognize. I would need dimensions, but look at our 18-008 as a possible replacement.
A quick learner from Modesto, CA says:
The top sash guide is 2" long, 5/8" wide and 9/16" deep. The first screw hole is 3/8" from the top. Does the shape of the guide affect its function?
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Not necessarily, as long the width and depth match you should be fine.
A quick learner from Modesto, CA says:
If I use the 18-008 part 1/4" of the top sash guide will be sticking out. The hole where I put the screw on is 5/16 from the top. The profile is 1/2" on the top section and 1/4" on the bottom section. Is 18-008 still my best replacement or do you have another alternative?
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
As of now, that's our closest replacement.
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