but also farnell have the NSF Controls switch kit !!
serch for NSF Controls under rotary switch for the wafer and under switch components for the mechanism !!
Are you talking about the switches where 556-512 would be a dual shorting 12 way in that range.
If so these are not the same as the switches I`m using from RS which are a lot cheaper & come in at less than £20 for a 3 pole 12 way including VAT. The part number that will get you onto the RS ones is 327-894 on page 1465 of their current orange catalogue