Help! Can't find this weatherstripping

A handy person from USA says:

I have been looking everywhere for replacement weatherstripping, please see the attached images. I need about 12 feet of the T-Slot weatherstripping. It says Q-LON on it.

Any ideas??
User submitted photos of weatherstripping.
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Tom from SWISCO responded:
Unfortunately, we do not have this exact seal. That said, you may be able to use something like our 58-135. Carefully compare your dimensions to yours in order to confirm if this could work.
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