It may be too late for this trip since you may have already left the country, but Mailboxes Etc., here in Oaxaca, does as good a job as any company, probably the best. While when they first opened in Oaxaca a few years ago there were some growing pains, all seems fine right now, and the American franchisee assures me that if the insurance claim is not paid promptly in the event of breakage, he'll step in and help out, personally. I took him up on the offer about a year ago, on behalf of a client, and payment was prompt, of course not that anyone wants things to go that way. Mailboxes uses the foam blowing machine, which affords the best protection, and probably reduces the likelihood of customs tampering. Insurance costs are nominal and worth it. But just make sure you insure for the actual amount you paid. Be consistent in your declarations. And be careful when unpacking so as to make sure that YOU don't cause the damage when pulling the foam away from the particular craft.
Casa Machaya Oaxaca Bed & Breakfast
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www.oaxacadream.com]