bubble seal for Truth crank windows

Do you have a bubble seal that could replace the gasket on the Truth Hardware crank windows. It looks like 25ft Bubble Seal, 3/16" x 11/32"
Product Code: 58-135 matches the best in terms of measurements (mine is 5/16" diameter and the widest part of the "t" is 3/16"). The bottom of the seal I have is the same material as the bubble so it is soft and pliable. I am concerned that the T looks like hard plastic and will not fit. Can I get a sample to see if it will work?