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