i had a hand made one out of some climbing rope would swear by it until i let my cousin take the mutt out for a shine an he lost
get a length of rope that will fit round the mutts neck, melt 2 1" purse net rings into each side and another length for the slip put it through the rings and there is your slip and collar, if i can dig up some climbing rope i will rig up another so you get the idea lol
as i said would swear by it
atb shaun