Hi there,
if anyone is interested these new planet waves 'Nylflex' are a recreation of the old 'Herco' heavy grey nylon picks that Rory favoured (along with Jimmy Page) and countless others..these are much better than the Herco branded picks that are available now, thicker and springier...with a pointier end, and less slick plastic...
sorry to geek here out on what might be a trivial thing to some people but it was a big deal to me to finally get these...(and I don't work for planet waves)
the 1mm gauge are the ones to go for! they're made by d'addario so they should be very widely available in most music shops
http://www.planetwaves.com/pwNylflexPicks.Page