Hello!
Just got one of these and I thuoght you'll probably like it:
The final "product":
It's a "keyless entry system" that connects to a central locking system. The keys are blanks so I had to copy them at a special key shop. It costed me ~50 quid, and i have two remotes(with keys).
They have systems like that with built in alarms! I had an alarm before this, and it was rubbish! It was starting in the middle of the night and sometimes, when i forgot to unlock it - it didn't turn on, only when i was in the car and starting the engine.
central locking in a k10 is easy peasy ive fitted loads of k10s with it now and makes the car alot newer for every day use no more leaning over to unlock the other door haha