Pretty sure the price is gonna be about the same across the board. I'de just go with a a vendor that carries the product that has been good to you and support them with the purchase. MetalCloak only seems to sell through reputable dealers so I don't think you could go wrong.
Support your local MetalCloak dealer and order from them. They'll be able to give you the best price on them. The reason you don't see them being sold online other than from MetalCloak is because they only sell directly to the consumer or to shops with an installation facility that knows Jeep products.
I get my stuff right from metal cloak. the 2 local dealers were very hard to work with on my first order and the the one that is shipping now is a custom order. First set of stretch rear corners, so no dealer would have those yet.