Smallest FireWire Enclosure?

waffffffle asks: "For my job, I need to carry a bag of tech gear around with me all day. I've been able to cut down on the cables I carry by using only retractable cables, but my other devices are still bulky. I'm looking for the smallest FireWire 2.5" drive enclosure on the market. It seems that many of the sites selling enclosures don't list their dimensions and some of the slimmest enclosures are USB-only, but 6-pin FireWire is a requirement. What is the slimmest enclosure you know of?"