A client had a 535 with a missing button for the switch. But where to find one? I was looking all over the interwebs but wasn't having any luck. And I wanted to give the dude a working pedal so he could do a gig.
So I went all old school and made a trip to the hardware store. I got some thin wooden dowels and some nice birch buttons. I cut and whittled down a section of the dowel. Then I drilled a small hole in the button and glued the section of dowel. Bam!! New replacement button in natural wood color. With a little spray paint these would look just like the original.
Later I finally discovered some authentic Dunlop plastic replacements at www.newoldsounds.com - they cost more than the wooden ones.