At Gladiator we stock several enclosures, some are just USB 2.0 other are both USB 2.0 and Firewire. They come retail boxed with power adaptor, available in 2.5", 3.5" and 5.25". A few different designs but may be something there you like the look of.
Some of our customers report problems getting DVDRW drives to work in the 5.25" ones, but other optical drives and hard drivers are fine.
I hope that helps.
Cheers