Here is a link to the manufacturers who use Duelund products. Some use only the capacitors and resistors. Others use both the caps and resistors as well as the wire. I also am curious, for those who use the wire, particularly in internal cross-overs, how they route the wires and what they might use for dampening the wire from the drivers to the cross-overs.
http://www.duelundaudio.com/References.asp
http://www.duelundaudio.com/References.asp