Bilt Best Window Bubble Seal

A home owner from Westfield, MA says:
I am trying to locate a bubble seal for a Bilt Best window, circa 1990-91. Your company has the bubble seal for the sides of windows (50-088) but it may not work on the top and bottom of the windows. This bubble seal has a 3/16" U-shaped channel that fits into an metal slot on the window frame. I could not find a matching product on your website or within catalog but perhaps I am looking for the incorrect nomenclature. Alternatively, you may know where I could find this product. Thank you. Mike Barna

Bubble diameter is 9/32"
Width or height of U-shaped channel is 1/8"
Length of short tang is 1/4"
Length of long tang is 5/16"

If anyone has an idea on where I could find this, it would be greatly appreciated, These bottom seals are the practically non existent in some of the windows.
User submitted photo displaying the profile of their bubble seal.
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Mike from SWISCO responded:
The closest weatherstripping we carry would be the 58-164 Dual-durometer Weatherstrip. However, it appears that the bubble seal portion of the weatherstripping snaps in, and the Swisco 58-164 may be a little too stiff for your application.
A home owner from Westfield says:
Thank you Mike for responding. Yes I saw the 58-164 but don't think it would work. For now, I am going to probably cut the bubble tube off and apply an adhesive backed tube from Frost king. The ribbed flange is fairly rigid and I think I will be able to clean off the soft rubber tube section with a sharp chisel, clean it and apply one of the better Frost King products. Given that I have a deployment coming up, I don't have time to hold out or search for the correct product.
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