Design Automotive Simple Buzzer

I want to kick-off a line of small automotive sound devices by starting with a straightforward 12 V buzzer that gives a single, clear alert tone. Your job is to take the idea from concept all the way to... (Budget: ₹12500 - ₹37500 INR, Jobs: Automotive Engineering, Electrical Engineering, Electronics, Embedded Systems, PCB Layout, Product Design, Prototyping, Signal Processing)