Sennheiser
updated their official replacement pad from the HD559 (Article No. 572287) to the HD 598 SR (Article No. 575209) pads.
On the product site of the
HD559 (572287) pad they say that the pads will produce a warmer sound with the HD560s.
On the product site of the
HD598 (575209) pad they say the pads will produce a more analytical sound with the HD559.
Some time ago
I posted measurements in this thread of how the HD559 pads produce a quite different sound than the stock pads on my HD560s and concluded from that that there is no suitable replacement pad or that there might be quite some variation in the pads. Other users thought the pads i got might were fake. Turns out that their replacement pad listing/recommendation was probably just wrong from the beginning (or at least for the time period when i checked their site for replacement pads).
So if you get replacment pads for your HD560s, make sure its the correct one.