There are companies like Caribetrans and Viacargo that can send cargo wherever by air. I suggest to buy bubble wrap for the fragile articles and to place an insurance for them. I suppose they are valuable since you want to take them to U.S. Insurance for cargo is not expensive and the transportation companies include only a minimum that usually don't cover the real value of the cargo.
If you want further info pm me. Also, tell me where are you, so I can give you the right info on who to call.
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