Tiemen
Headphoneus Supremus
Thanks, but I guess then the ones on my link aren't the right ones, as the description reads: "The thick earpads are suitable for use on numerous large cup size, over the ear headphones."
So I may have to find the right ones elsewhere.
Maybe you can contact http://www.mp4nation.net/ and ask if they have some spare original HM5 pads. I can't find them on their site anymore.