My BenQ 1640 has finally quit working, and I need a replacement.

I do computer repair, and my primary need is an external, USB drive to be able to work on Netbooks and other computers that do not have an optical drive built it. Every once in a while I need to burn a disk on my desktop, but not often. I could use the external optical drive to do that when necessary.

The problem is when looking at NewEgg, it doesn't appear there are any external USB optical drives that will burn media (I need CD's and DVD's, speed is not that important).

Am I searching wrong? Any help appreciated and thanks in advance.