Custom Triangular Window Curtains

I need custom curtains for triangular windows made of polyester fabric. The curtains must be functional, allowing them to open and close. Attached images show the window and the design of the device to open the curtains. Windows are 89 inches tall and 81 inches wide. There are 2 of them that are mirror images.

I would like to connect with an expert to...
- Help define how the curtain is to connect to the opening system.
- Assistance in finding the specific material.
- Sewing and shipping the actual curtain.

Requirements:
- Experience with sewing curtains, especially for non-standard shapes
- Proficiency with polyester fabric
- Ability to create durable and functional curtain mechanisms