I can do better. I have a connection through some of my home suppliers and have been looking into some parts. I am pretty certain that I can create a true keyless entry/exit and engine start/stop that uses proximity and a fob that can fit on a keychain. So long as the fob is on you the doors unlock and lock (as you walk away). It allows true keyless start and will not override clutch switch. It won't lock doors if key is left inside and can activate a warning. It has biometric security and the start button will need fingerprint recognition. That then can be programmed to do a number of things. There are multiple fingerprints that can be stored, and a valet mode.
If anyone that is reading this and wants to help me with the development of a kit, PM me. I can supply the correct parts and diagrams. Needs testing, and I am a bit too busy.