If you have a chance I'd like to discuss your project a bit before giving you a real quote. I've attached some ways to reach me. Certainly if you can send me a unit and any documentation, it should only take me a couple hours to recreate what you have, and I can get started on it tonight/tomorrow. We're a small shop geared to quick turnaround jobs, and I've dealt with a number of situation like this and modifying and/or reverse engineering existing products when engineers have left.