If you end up stuck and need a quick fix, then Maplin L23AY (£25, half price) works fine on three different Vaio laptops we have here. It is also sold as the Trust PW-1350p.

edit: £447 is rather steep! I did warn my boss that the Vaio support was reported as being dodgy (all has to go to Belgium?), although I admit they do look very nice.

Gareth