Someone told me Acorn Windows

A handy person from Michigan says:
May 22, 2018
I had to cut the last 1/16 or 1/8" in order to remove this piece of spline. Only removed this 3 inch piece in order to try to locate new spline. This is on the fixed window side of the aluminum slider. I have broken seals on all of 4 of the fixed windows. An old timer at a mom and pops window shop told me I had an acorn window. Your acorn splines seem close but not exact. Please keep in mind that I had to cut a small portion off inside of the track and could not retrieve the piece. Can you help?
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Tom from SWISCO responded:
May 29, 2018

Thanks for your patience during this busy season. Take a look at our 55-071. This looks a little closer to your shape, in my opinion. I would just make sure the dimensions match up.
3' Acorn Snap-in
3' Acorn Snap-in
55-071
$10.19
6' Acorn Snap-in
6' Acorn Snap-in
55-050-6
$15.98
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