I am buidling a 16th Century Ottoman Army using Baccus (obv.), and as I am assembling it, I find to my shock there are no Levant/Azab Archer models.

Can anyone reccomend a good proxy from elsewhere in the range?

Also, I am going to use WOTR Billemn as Voyvuk (Christian Balkan Levy) for now, unless anyone knows another suitable proxy.

Can you give me an idea of the appearance of these chaps?

I think the closest might be the Seljuk or Levantine archers in the Saracen range? 

Assuming this kind of thing is what you had in mind?

That looks like an archer dressed in 'Haiduk' clothing.   We really don't have anything like that in the ranges.  Aa whirlwind suggests, maybe something from the Saracens ranges, painted appropriately and perhaps viewed with a squint may pass.  Sorry that I can't be more positive on this one.