[Mk2] [NA] Need a new fog light button bulb - but where from?

[MattMR2]

I'm hoping one of you guys has been here before.

I think the bulb in the switch for my MKII 's rear fog light has blown, the rest of it works fine.
I've taken it apart and can see a very small bulb, not the sort of thing I would expect to find in Halfords.

Take a look at the pics, the bulb is in the red square.



Any ideas where I can get a bulb like this from?
A number on the underneath of the bulb just says TS and J.

Perhaps I'll have to buy a whole new switch? Don't want to fork out for that though. Bet its not cheap

Thanks,

Matt

[MattMR2]

Yep, I tried the obvious and called the main dealer.

Part no. T84999-20120 £3.62