There are companies that make custom aluminum crates. If you aren't travelling for a while, you might check into these companies. As well, sometimes you can get a "deal" on them (they're quite expensive, but worth it if your dog has a crowbar in his pocket) if someone's ordered one and not followed through with buying it.
These dog crates are very sturdy, and will contain even the most imaginative beastie.
Here's a link to one manufacturer:
Single Dog Crates