Hi Joe,
   You might try a spin on polyimide, available from HD Microsystems,
in conjunction with their adhesion promoter VM651 for the PI-glass bond.
Then you can functionalize the Kapton surface using an acid treatment
and bond to a partially cured layer of polyimide. You can find recipies
in the literature for polyimide-polyimide bonds.

Good luck,
   Mike Martin
   U. of Louisville