New locks on Hymer B544

WanderingHans

We're looking at replacing the locks (doors and lockers) on our Hymer as the keys we have are sticking - I'm worried we'll be locked out somewhere one day!  The ignition key still works fine.  Has anyone had this done before?  Was it done at a garage or
by a locksmith?  And most importantly, if you don't mind me asking, how much was it?