I need some help from anyone in the Durham area.

I've tried calling all over the place today, and can't seem to find someone with Corrugated metal with a decent gauge. I did find some sheets at Lowes and HD, that were perfect size, but 33 gauge. That's really really thin... I'm looking for somewhere around 18 gauge.

2 feet by 8 feet preferably, but any help would be much appreciated.

The wife wants some raised garden beds... I'm going crazy.