Are you sure its snapped as sometimes they angle away and the tool wont connect.
The tool isnt worn or cracked is it ?
If not its possible its been rounded off a bit .. a selection of 1/4 inch sockets on an extension would be my first attempt , failing that you could pull the arch linner out and see what access you have .
Not something ive come accross before im afraid .. i usually manage to jam something on it in the end .
Hi Mike, I had exactly the same issue, managed to get the light out by brute force really from the front (using some plastic interiror tools to lever the headlight) - must have been really tricky to get a drill bit in there .
I can't remember where I got mine but if you google you will find plenty of instructions for PU removal, it's not difficult but there are quite a few steps - I always take loads of photos as I go!