I know that Pirelli are the manufacturers of the Calendar but only produce several thousand and many of these are given as inter-trade gifts and PR offers. Therefore going to Pirelli is not productive.
I was hoping somebody might know a way of obtaining one through these routes.
I would give it a month or two and then check everybody's favourite auction website - eBay. They seem to have several older Pirelli calendars for sale at various prices. I'm sure that one will come up soon enough, but you'll probably get into a big bidding war with other people who are just as keen to get their hands on one!