Mark-

I have a source for adhesive backed neoprene seal strip. It comes in 1 inch width with thicknesses from 1/8 inch to 3/4 inch (1/8 inch increments. You might be able to find similar stuff from McMaster-Carr, but if you run into a problem, let me know and I can put you in touch with my supplier.

Email: Mark (at) mmfabrication (dot) com