I have the Hartge ARBs like Tony, a better choice IMO
I wouldn't think that your dampers are compatible between the models.
The M3 camber link has a 'conventional' bolt and bushing fixing on the damper base, whereas the 335i (and all other E9x) has a 'spike' type end that pushes through and sits in a rubber seat.
335i
http://www.realoem.com/bmw/showparts...83&hg=33&fg=45[
M3
http://www.realoem.com/bmw/showparts...10&hg=33&fg=45
Its over £400 for the rear links (4 off) A lot, but maybe I can treat myself!