Radiator cap on 1934 Ford

[bill4704]

I have a 1934 Ford pickup. This week, it started leaking some around the radiator cap. I lost about 2 qts of fluid over about 20 miles of driving. However, the temp gauge was never close to hot. This radiator cap is just a ring of rubber that fits onto the top of the radiator. I have included a photo as an attachment.
Is there a pressurized radiator cap available for this truck? Thanks, Bill