Radiomaster XR1 Clone Design

I need a complete KiCad design that reproduces the functionality of the Radiomaster XR1 transmitter. Exact mechanical dimensions are not critical (although size should be minimal), but every feature the original offers must be present and proven to work over ELRS eg dual 2.4GHz / 868-915Mhz... (Budget: £250 - £750 GBP, Jobs: Circuit Design, Drones, Electrical Engineering, Electronics, PCB Layout, Product Development, Signal Processing)