Looking for a pair (f+r) of cantilever brakes - the sort that don't have the pin projecting out from the back of each brake arm that sits in one of the holes on the plate mounted behind the canti stud. Spring tension/centring is adjusted by means of spanner flats either behind or in front of the brake arms, the 6mm bolt tightened once the brake is centred. Dia Compe made a few models - the 985/986/987s, as did Suntour and Tektro. I need silver ones please.