2 style radiator caps- where to buy what I need

I was doing a little cross referencing for a radiator cap on my '85 AMC Jeep.
FWIW it appears that Motorad T16V is a 16 psi vented cap for Chryslers and AMC.
Vented meaning it closes only when vapor or liquid pushes on the valve as described above.

Based onthe photos is appears Gates is repackaging a non-vented Motorad cap. :(