Paul have you tried in money exchange places?

On the other hand why not plain US$ Traveler Cheques? Nevermind!!

Also there are several posts/topics on money exchange

http://www.qatarliving.com/search?cx=008937172676595728955%3A066rihafv68...

I know you are looking for some direct info, but searching and doing a lil reading is always a good idea.

Regards!!