My enquiry to Pioneer's mail order retail spares company led me to this:
http://www.4ourhouse.co.uk/cgi-bin/product.pl?PID=3745307
I'd be cheaper getting it from Germany!
However, the same site had this:
http://www.4ourhouse.co.uk/cgi-bin/product.pl?PID=3434011
which is considerably cheaper than this:
http://www.4ourhouse.co.uk/cgi-bin/product.pl?PID=3442693
I think that last one must be pressed to order!
(£1 = 1.16 Euro = 1.49 USD)