need the little bracket that connects to the post,
I've using clothespins right now, could make one
from wood, and may resort to that if I can't find
one here...
I don't have a Durst specific one, but I have a set of mounted Kodak contrast filters that include a universal mount (I believe it attaches directly to the lens). They came with my enlarger, but it has a filter drawer, so I just picked up a set of ilford sheet filters.