4 pages of tires manufactured in Europe plus Asia not available USA?

New to the forum but not to the Darkside.    I love the C/T on my 1990 GL1500 but want more options than Austone and a few available here in the USA.
There are tons of tire manufacturers that make 175 75r 16 tires that would fit Goldwings and other bikes.   Anyone had any luck finding a shipper or someone who will stock some of the these tires available to the U.S.?     Just wondering?    
Some available brands are Hankook, Avon, Goodyear, Continental, Bridgestone, Michelin, etc..

Many are 8pr tires and multi/season tires which will last miles and miles.  

Maybe we ought to see about forming a Car Tire company to give a little competition for M/T and a few who offer a tire.