Polyester fabrics

Hello,
i am starting with my first,own fashion label for beachwear.
I produce tunics/kaftans made of 100% polyester. unfortanitly the shop in sofia, bulgaria from where i have my materials they have them from turkey and a very small amount to choose.
i want to buy my materials direct in turkey. do you sell printed, silk, viskose,polyester materials?
if not,could you maybe help me and tell me where in istanbul
i can find shops who sell these kind of thin materials?
thank you! with kind