You can get pretty close with these knobs from Small Bear.

http://www.smallbearelec.com/Detail.bok no=1192

They're for knurled shafts and are also very similar to (but smaller than) the knobs used by Pittsburgh Modular. I've replaced all my Doepfer knobs with these and, in my opinion, they look much better.

Small Bear is cheap and ships to europe.

--- In Doepfer_a100@yahoogroups.com , <yahoo@...> wrote:
>
> > Hi Dieter
> >
> > Thanks for your reply. If there are any surplus Dark Energy knobs
> > when its production run finishes, would you consider selling them off
> >
> > Thanks.
>
> We sell these knobs as spare parts. But as we are not an electronic shop
> (and do not want to become one) the prices are a considerably higher
> compared to electronic online shops.
>
> Best wishes
> Dieter Doepfer
>