Hello,
I'm a working freelance electronics designer from the greater Seattle area and have been doing this for the last 2 years. I recently did some work for a group of people in the area who wanted to light up this year's burning man. It sounds like you are looking for something remarkably similar(A wearable EL system, yes?).
So I can easily modify my current PCB for your situation, add your 3 modes, remove the bluetooth and have you a solid product. However, I need to know a few more details, such as just how many of these panels you will be turning on(and if possible the exact product numbers), how long you expect them to be on, how thick the entire package (with the battery) can be and what the total cost you are envisioning for your product will be.
Let me know if I can help.
Cheers,
Zrem