Electrochromic Lens Prototype Development

I am building a sunglasses brand around electrochromic technology. Sunglasses that electronically change their lens tint or shade at the press of a button. I own an existing electrochromic sunglass unit that I would like to use as a technical reference to understand the core components, dimensions, and electronics involved. Based on those findings, I need a completely new and original custom sunglass frame designed in CAD and 3D printed around that technology, with a button integrated cleanly into the temple arm. The final deliverable is a fully assembled working prototype where the lens tinting functions correctly through button control, ready for demonstration. I am only accepting fixed price proposals for the complete project. Please include your fixed price, realistic timeline, and relevant experience with electrochromic technology or similar smart wearable devices. This project has long term potential and I am looking for an ongoing development partner, not just a one off job.