I've been looking into this myself.
Seems like a fairly easy job to swap the bulbs. Mine are still working fine but Id rather have a more white look than the halogen yellow so LED.
P13W are the bulbs required and to access these, the headlights needs to come out (fairly easy) and a couple of predefined holes cutting in the rear of the plastic. replace bulbs then seal up the holes again with silicone/rubber caps.
Cheers for the info. Will definitely do it myself. That was not for a headlight that was the bulb and then he said I’d have to book it in for fitting. I think it was a halogen bulb. I was too busy laughing at him to pay much attention but he may of said it was gas would this be different?