You could try the Canadian distributor for Line 6 parts - SF Marketing, based in Montreal:
I have ordered and received numerous Line 6 parts from them. You can cite the Line 6 part #s you desire. There are 6-ft., 20-ft., and 50-ft. cables.
Does anybody know where I can purchase an AES/EBU data cable in Canada to connect the DT-50 to my HD500? I tried twice at Long & McQuade, but they are not interested in ordering it.
L&M actually refused to order a Line 6 product for you?? Please confirm that for me.