USB 2.5" enclosure with RAID?

[HardUp4HardWare]

I am looking for a USB External hard drive enclosure that will do RAID 1 (mirroring) for 2.5 disks.

Want to do this cheap.

Does such a thing exist?

 

[HardUp4HardWare]

should say I dont need a NAS.

 

[Enlefo]

Yes they do exist, I have used one before, had the two disks next to each other. Weird concept... can't remember the brand :-( Look at stuff aimed at AV applications.