Etrailer is a great source for most things relating to trailers.
Here is their page for 14" wheels: Wheel Only 14 Inch 5 on 4-1/2 Inch Tires and Wheels | etrailer.com
It looks like 65psi is no problem with the "fancier" wheels.
One word of caution, however. If I remember correctly, the AM20305 wheels I bought were stamped 60psi, not 65psi. I called etrailer and (again, if I remember correctly), they said not to worry about it, they can handle the 65psi. But I do worry about it and keep the tires at 60psi - with my 2500 lb EggCamper, that isn't a problem. With a trailer approaching 4000 lbs you might want to call and discuss it with etrailer before ordering.