The Morris Minor gas cap is unique and is not interchangeable with other models. Supply can sometimes be a problem but a bigger problem will result if you lose yours. The location of the filler neck means that without a cap not only will the gas evaporate more quickly but you will also get water in the tank. Our new chrome caps look great and if you are trying to freshen the looks of your pride and joy- treat it to a new cap AND just as important- keep you old one as a spare!