Bill,
Sig will be your best bet on that. I had one getting lose on mine so took it off and cleaned all the mystery glue off. Made a new backing plate the shape of the canopy foot and glued it to the inside of the hatch area. I then put 8, 2-56 blind-nuts with button allen screws in the mix. The screws I used are like the ones some use to hold a car body on with.