I've been using some Dia-Compe canti pads on my Mafac cantis for some time. I first tried the 5 dot tandem Mafac pads with the predictable intolerable results. The Dia-Compes look just like a 4 dot Mafac, and though I don't think they're the last word in braking power, at least they're quiet! I don't even remember where I got them other than from my misc. junk drawer!