Here are handset restraints for antique telephone cords. These are the C hook type and made out of aluminum.

 You receive 10 restraints. You bend them and crimp them on your cords. Good for other applications also. 

 Made out of aluminum. 

 We also sell 50 pcs for  $28;  100 pcs  for  $50  and if you buy more an even better deal.  Just let us know.