Maybe the rules on what we are allowed to hunt should be changed. I can think of some urban "pests" that would make a good hunting "sport". The Saiga might be one of the preferred shotguns.
If this ruling holds, perhaps the manufacturer will do the same as others have done in the past. They will merely "license" a US Manufacturer and thereby eliminating the requirement for "sporting purpose" in order to import.
This is how a lot of revolvers were sold in this country by foreign manufacturers after the import of 2" bbl'd revolvers were barred. Ditto on firearms like the Walther PPK.