Ah, there are no plastic ratproof feeders. Gotta be metal. Curious though, screw in type? Are you talking about the PVC elbow feeder type or companies that sell the "port" and you supply the bucket? Those aren't ratproof either. Rats can and do jump dozens of times their body length.
Export is expensive. If it is from the U.S. the export documentation is a pain, usually a trip to a state chamber of commerce at the very least for an export declaration. The few we have done use one of the package forwarding services and yeah, $$$$$$. You have the U.S. domestic shipping to get it to their address then the cost of export shipping and the documents needed. And getting past the crocodiles at Customs is another discussion.
Export is expensive. If it is from the U.S. the export documentation is a pain, usually a trip to a state chamber of commerce at the very least for an export declaration. The few we have done use one of the package forwarding services and yeah, $$$$$$. You have the U.S. domestic shipping to get it to their address then the cost of export shipping and the documents needed. And getting past the crocodiles at Customs is another discussion.