help me identify the balance and the guide

A quick learner says:
July 12, 2010
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
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Paul Sr. from SWISCO responded:
July 12, 2010
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:
July 17, 2010
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:
July 21, 2010
Not necessarily, as long the width and depth match you should be fine.
A quick learner from Modesto, CA says:
July 22, 2010
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:
July 22, 2010
As of now, that's our closest replacement.
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