want to eliminate key use in cap or replace with previous year cap, ideas?

seems to me most of my bikes of this era would open with any old key put just barely in the key slot (or a flat head screwdriver or paper clip or penny). Are you wanting to replace it just so you don't have to use a key? If that's the case I think it's far easier to open it with the keyed type (as shown above) rather than a screw off or button push style from earlier models. Just put your flat head device of preference and pop it open. My two cents (or one cent really).