Hi,
it should be possible for you to swap the inner headband yourself.
Have a look at the service documents:
K601/701:
http://www.akg.com/mediendatenbank2/psfile/datei/58/k601_k701439d5815555d1.pdfK702:
http://www.akg.com/mediendatenbank2/psfile/datei/4/k70248b2a8664eaf0.pdf The part you want should be 2458M9801 (inner headband, complete, K601).
Don't order a K701 headband since those also have the bumps you don't like.It looks as if the inner headband can actually be removed without opening the earpieces themselves.
The distributor in Estonia should be able to send you the headband (and, in fact, all other parts of the headphones, if required):
Estonia
IS MUSIC TRADING
Rävala Pst. 8-C103
10143 Tallin
Raivo Sersant
Phone: +372 6 612440
Fax: +372 6 612444
I'm sure they can also do the modification for you, should you decide not to do it yourself. But if you're careful and don't use brute force, you should be fine.
Kind regards,
Stephan