I'm doing the 15mm Sudan project now, and I found loads of middle east civilians from Peter Pig and irregular.
You have to look at all the lines. I found generic Middle east suitables in ancients, pirates, modern (Yes, the AK 47 range has some gems, I used "African" looters, street arms dealers, and personalities).
If you are ever on TMP, (On "19th Centrury Discussion" formum)
I have a thread that lists the suitable Middle East minis from every 15mm manufacturer I could find or was
suggested to me.
It's comprehensive, so check it out. (I can't access TMP now, or I would link it or just copy my list. I'll do it later)