Mini Mod Trailer Rim for a 15 inch Rim with 6 on 5-1/2 inch Bolt Pattern

I want a couple of Dexstar Steel Mini Mod Trailer Wheels - 15inch x 6inch Rim - 6 on 5-1/2 for fitment of Carlisle ST225/85R15 Load range E tires. I would strongly prefer the wheels be galvanized, but dont know if they are available that way. Can you help? If they would be available thru special order and not too long for delivery, I would be willing to order 5 of them at one time.

asked by: Lee J