Analog-Digital converter for automobile ultrasound parking sensors

I need someone to design an Analog-Digital converter for automobile ultrasound parking sensors. I have installed a standard ultrasound parking sensor kit on my car. The device is similar to the one shown on the following link: http://www.amazon.com/XD-066-Display-Reverse-Parking-Sensors/dp/B0055XCLK4/ref=sr_1_1?ie=UTF8&qid=1405482577&sr=8-1&keywords=parking+sensor The ultrasound sensors get a lot of noise when I turn on my headlights or run other electronic devices in the car. I have tried everything possible to remove the electrical noise but I have not been successful. I am also unable to replace the sensors because they are painted with the bumper, and if I try to change them I risk damaging the paint on my bumper. I would like for someone to design an Analog-Digital converter that would attach to the 2-wires coming out of the back of EACH sensor. There are a total of 4 sensors on the bumper. The Analog-Digital converter should convert the analog signal from each ultrasound sensor into a digital signal that will not be susceptible to electrical noise in the car. I would also need you to design a receiver that would receive the digital signal from the 4 sensors, and convert it to be displayed in the digital display that comes with the parking sensor kit (see the [login to view URL] link I provided earlier). I will send you 1 complete parking sensor kit (similar to the one shown on the [login to view URL] link I provided earlier). The kit will include 4 sensors, the analog receiver, and the display. You should use the 4 sensors and the display from the kit. We will replace the analog receiver with your digital receiver. Your bid should include the cost of design, building 4 Analog-Digital converters, and making 1 Digital Receiver. The parts you build can be large if needed. Once you have tested the device and everything works well, I would need you to mail it to me in Los Angeles (the cost of shipping should be included in your bid for this project). Once I test it on my vehicle’s parking sensors and everything works well, only then I will release the payment to you. At the end you must also provide me everything I need for making additional devices, including: Schematics, Gerber files, Parts List, Detailed instructions for assembling the device, and detailed instructions on how to program the device. You must use electronic parts readily available on [login to view URL] You must also make the device to be programmable using the microchip pickit2 programmer (this is the programmer that I have). Please let me know if you have any other questions.