Replacing cushions in a Senn HD 380 PRO

Hi there, I'd like to know where could I find both a proper cushion for a HD 380 PRO can (in terms of purchasing, since sennheiserstore doesn't seem to have any specific replacement for these ones) and also a tutorial on how to replace them. It looks easy, but I'm not rly sure I'd remove my current cushions with no knowledge on how to put them back . A video-based one would be greatly appreciated.

Also, where could I find a proper cable replacement? Is there any specific model/store/whatever I should check?

Ok, already found the proper ones. I'll leave the link so anybody can find'em

http://www.sennheiserusa.com/serviceandsupport_part-finder_cushions_085733

And here's the tutorial. This is on a HD 280 PRO, but I'm pretty pretty sure the procedure is the same for these.

http://www.youtube.com/watch?v=SXqL7Q-tW6Y

However, still have a question. I've noticed the replacement cushions are exactly the same than the original ones (kinda obvious, but you know there could be some alternative/mod intended ones right?), and was wondering wether I could make other models' (like the HD595's) fit in the HD 380.