The closest dealer is in Germany. Freight would be exorbitant. The pop-ups are made in China and distributed by Polar Bird based in Russia. The US distributor, Nikolay Krupelnitsky, a young Russian kid, bailed and abandoned the brand. You would be far better off trying to find a hub that would fit/work from a well known US retailer; Eskimo, Clam, Otter or Frabill. Take some measurements and make some calls.
DN