It would appear that Porterfield.com is the only place that still sells these older pads.
Any one else selling them???
Also, does anyone have a pic of the REAR GD535 pads handy? I have a Porterfield box with a new set of pads in them.....but am unsure if they are R4S's or stock replacements that got stuck back in the R4S box.......ugh! No numbers or writing of any sort on these new pads.