I need a new drivers side door lock (barrel) for my Scoob, anyone know approx price, and can I get it matched to my current key or will I need to get a full set.

For those wondering, heres what happened. :- Someone who works in my building gave his keys to a muppet colleague to get something out his car, he tells colleague its the red audi in the car park (quite old one), she then confuses his red audi (how i have no idea ?!?!?!), with my MY98 scooby and snaps the key in the door lock, the barrel of the lock is rotated 1/4 and theres nothing left of the key to grab hold of..

Any ideas ?? (sorry posted twice)
Thanks