Nitto makes hundreds of differnet products these days. Yes, you are right they do not have a very comprehensive catalog. Rivendelle and a few others bring in some of the items that Nitto is capable of making but no one carries it all.
Last year I had them bend 44cm and 46cm deep drop steel track bars. They could not understand why anyone would want them but they did it anyway. And because I got 250 pairs. We are on our third batch and lots of people love them. They still wont put the Cinelli logo on it for me (just kidding) but I am pleased with the quality.
Nitto does not even try to market their products in the US. They are content building for their local market and relying on a handfull of distributors that stock some of their items. I have seen beautiful track bikes they make for Kerin and numerous clever inventions that unfortunately do not have commercial appeal in the US.
I meet whith Mr Nitto and his engeneers each year at Interbike and share ideas through a translator. If you would ever like them to fabricate something and make enough of them, send me your drawings.
Bradley Woehl
American Cyclery SF CA