Hi there,
I'm a senior electronic engineer/designer/developer, doing designs & developments for over the last 30 years. I think I can make what you need, since I believe it's not for a mass production (but repeat production possible), no need to built from the scratch. The longest time needed (about 1 week) is to produce the PCB fabrication (the design will be done by myself) because it will be outsourced to the factory, get into their order queueu. Excluding that time of process, I only need 3 days.