Does anyone know where, in the UK, I can buy a cordless (battery or rechargeable) screwdriver that has a clutch?

I've got a Black & Decker rechargeable screwdriver that's really hand for PC assembly etc, but the lack of a clutch makes it a bit on the heavy-handed side when inserting mobo screws. I've seen a few items on the web (lots in the US) where these things seem to be readily available, but I can't get one in sunny England.

Basically I'm looking for one that's as slim and light as possible.

Any suggestions?