Ya I just had the same issue with 5.29's.
I can get them from Japan via a local gear importer who brings in shipments every 6-8 weeks. I ordered a set for a forum member who paid up front. Well this particular shipment for some reason got held in customs (in Oz) for almost 3 weeks for some inexplainable reason even though all his other shipments are cleared within 2-3 days. Thankfully I got the gears in my hands now ready to ship to the US much to my relief.
I had nightmares of a Mitsu enthusiast working in customs recognizing what they were and stashing them in his locker and changing the paperwork <img src="/forums/images/graemlins/scared.gif" alt="" /> Wouldn't be the first time I bet..................