ckaas_mongolrally

Hello everybody, I'm hoping someone can help me out with a thorny short-term insurance question. I'm participating in a charity rally this summer, driving from Spain to Mongolia. I have yet to purchase a vehicle, but am looking into short term insurance that would cover me at least for the EU part of the trip. I haven't found any companies that have been able to deal with the following however:

1) I am 22 years old

2) I hold a US driver's license

Does anybody know of a way I might be able to purchase coverage? I would appreciate any insights you may have. Thanks in advance, Christian