The simple solutions are to seize any assets controlled on American soil, send an order to the credit bureaus to remove all references in all files from Kleargear, then ban those credit agencies from accepting Kleargear references. Lastly, put Kleargear onto the banking ban list so no American money can find its way to the company.
Since Kleargear admits they have no interests in the U.S., they do not qualify for 1st Amendment protections, allowing those bans and orders to be put into effect.
All of this bypasses Kleargear completely, and should be easy enough to implement and enforce. Buh Bye, Kleargear.