So far, I haven't had any luck at all. Every attempt to contact a non-USA vendor has gone without a reply and I've hit a brick wall with every USA vendor.
As I attempted to find a Spidi vendor, I was hedging my bets and have spent a lot of time looking into other gear. I've looked at everything I could possibly think of - BMW, Rev'It, Halvarssons, Motoport, Rukka, Olympia, and every other brand I could find. Everything I looked at was good, but in the end I decided to go with the BMW Comfort Shell suit, in black...
Although this was mega-expensive (I was able to save a little thanks to my friends at Foothills BMW in the Denver, Colorado area graciously giving me the open house price), I found this to be the most versatile for my needs (3 season gear, waterproof with minimal fuss -- read: no liner -- and relatively cool when it's hot).
That's not to say that other gear wouldn't have worked well (I was very intrigued by both Rev'It and Motoport), but the BMW gear seemed to offer the most versatility.
I really, really hope that Spidi and Motonation reconsider the decision to not bring the Step-In-Road pants to the USA as I think it would sell very, very well. If you happen to need gear like Spidi, however, Rev'It seems to offer comparable gear based on my research.