Did you have any luck? There is an N-Tane top on e-bay that needs the inserts. I don't want to give $500 for a top I can't find inserts for. Several years ago one of the aftermarket guys kept telling me that they had the molds and were going to make more but to my knowledge it's not been done. Thanks
Gas Pump Heaven is planning on reproducing the inserts. I spoke with them and they have some other projects ahead of these and thought it would be about 90 days until they get to production.