Thanks to all above. My 2006 XC70 Geartronic gear knob button has broken in exactly the same place. I have yet to find out whether it's the with or without pin version, hopefully Charlton will come up with the goods. Then as my days of car fixing are over, shall take that and the pdf along to my local garage who seem to be able to do anything on my car and have them fix it.
Then it'll remain 12 years young / 125,000 miles and just run in....