Apparently this is a definitive list of all R-spec tyres available in Australia, for what it's worth.
Avon (sorry don't know the model name)
Bridgestone Potenza RE55S
Dunlop Direzza DZ03G
Falken Avensis RT615
Federal 595 RS-R
Hankook Ventus Z211
Hoosier Sports Cars DOT Radial Wet/A6 & R6
Kumho Ecsta V70A
Michelin Pilot Sport Cup
Pirelli P Zero Corsa
Silverstone FTZ Sport Type RR
Toyo Proxes R888
Yokohama ADVAN AO48R
Thanks to Tarmac magazine, the 1st issue of which I picked up last week. It's a good read. www.tarmac-mag.com
It's missing quite a bit - it only refers to one model for each brand and is missing some brands - ie.
Goodyear Blue Streaks
Bridgestone RE 540S, RE55
Continental Conti Competition C1
Dunlop Formula R (D83J,D84J, D93J, D01J, DZ02G, DZ03G),SP Super Sport Race
Yokohama A021R, A032R, A038R, A039R, A048R
There is a bit of work to compile a list....