Hi, i have had some dodgy switches on my doser for a few years now (the square red push buttons on the pump panel) i have tried a couple of times to source a replacement but have not had any luck, i have got to the point now where i am unable to put enough pressure on the switches to get them to operate successfully, does anyone know where i might be able to source some of these please? (i am ok with a soldering iron)

I have tried RS, Farnell, Rapid & Maplin so am running out of options now....

regards
Ian