I have tons of pics, also of textiles... the images in the codices, on the vases, and the stucco/wallpainting are similar to the egyptian stuff - they are "flat", but give you a general idea about the clothing ...
I will try to find more textile pics in the evening... I know I have some in books that I could scan 
but I don't think you have to stick 1:1 to the refs - you can use the symbolic language for your creation - include the symbols in the dresses, background etc...
"The reason why truth is so much stranger than fiction is that there is no requirement for it to be consistent."-Mark Twain
gone.
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