Carnet complications

[Bikerboy]

I received my carnet in December of 2007 in the USA for riding in Africa and planning on continuing through Europe and Asia. Problem #1, I unfortunately did not get the carnet stamped out of the USA. Problem #2 The bike was stamped into Germany using the carnet and now I need to return to the USA (hoping to leave the bike here to return next spring and continue to Asia) but the carnet expires, hence needing to return the bike to the USA, in December this year. What are my options? I'd prefer not to ship it back to the USA as shipping the bike is one of my least favorite activities on the planet, not to mention expensive. I didn't have to put a deposit on the carnet, what happens if I simply don't return it? I could temporarily import the bike to the EU, without the carnet, and perhaps acquire another carnet to be able to continue on next summer. Surely there has to be a way as people do travel for more than a year with their bikes outside the country, no?