You may experience the same thing I did when considering the Walker Evans Legends. They are also produced by Ultra Wheel, and probably produced somewhere outside the US. They seem to wait until the have a larger number or orders (from multiple distributors), and then produce a run on wheels. I talked to both Jegs and Ultra Wheel when I originally placed my order for the WE wheels. Jegs kept pushing back the "availability date". I finally got frustrated and called them, and of course they don't have anything to say in that this is a "drop ship" product, meaning they are just a venue for Ultra to sell through. That's when Ultra told me they needed a certain ordered quantity before running a production of them. Who knows when I would have gotten the wheels. But my payment for them was certainly being kept while I waited, which I did not think was ok.
Wound up going with the Deegan 38s (
https://www.amazon.com/dp/B00SYNPS02/?tag=wranglerorg-20), which are close to the wheel you are looking at but only in 15x8. Seems that these are now on backorder.
I believe this is an overall issue for the 15" size category in a premium (aluminum) wheel, as most Jeeps on the road these days are running 17"+. Not a big reason for them to keep producing the premium 15" wheels until the demand is there. Only real option for in stock all the time 15" wheel are the standard D window steelies.