Where to purchase hubcap

[C&L Travels]

I have a 2007 Jayco Greyhawk. My rear hubcap came off somewhere on the NY highway. A Dealership contacted Jayco and found out they do not make these hubcaps anymore.
Does anyone know where I might find a replacement hubcap? The hubcap is about 18" wide and has 8 bolts.

Thanks

[2008Seneca]

Does the hubcap have a golden sprite or star in the center? Those are made by Dicor and available many places online.

If you need more assistance a picture of your other hubcap would help.