Chiang Mai - Bangkok Shipping Companys

This is probably a topic that comes up from time to time, but we would like to have some recent recommendations or warnings.

We will be sending original artwork; well packed and not particularly fragile, but we don't want it subjected to rough handling.

FedEx, our favorite and most trusted company doesn't offer a domestic service. Or so we were told.

Thanks for any information on alternatives that may be helpful to us and possibly others.