I would like to see the correct gas caps reproduced. The only way I know to get one is to buy a car with a correct gas cap, take the cap and resell the car.

I wish someone would reporduce them. Anyone know of one for sale?

theres a nos gas cap on ebay right know,4 hr 30 mins to go. it's at $15 with one bid.

Hello,factory gas caps are still stocked at your local
GM dealership or they can be ordered by them.
Part number for 67 and 68 is 3931449
part number for 69 vented cap is also 3931449
part number for 69 non vented is 405373 but that one is
discontinued.
List price for the cap is 17.89/Wholesale is 13.42.
If you ask nice most dealers will sell for wholesale.I know I do.
Good Luck