Seal for Door Threshold with a "T" type track

A home owner from San Antonio, Texas says:
September 20, 2020
I cannot find any source for this type of Threshold Seal here in San Antonio, TX.

The Threshold is not removable as it is secured to the door frame.

Can you please help?
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Bob from SWISCO responded:
September 24, 2020

See our 58-134 or 58-135. Take a look, compare the end profile dimensions, and see if you think one of these T-Slot Bubble Seals might work for you. 
Commercial Bubble Weatherstrip, 25ft
Commercial Bubble Weatherstrip, 25ft
58-134
$20.34
25ft Bubble Seal, 3/16" x 11/32"
25ft Bubble Seal, 3/16" x 11/32"
58-135
$15.57
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