I would like to obtain a replacement for a broken "Trigger source" switch on my Tektronix D1011 oscilloscope It's on the Right side of the front panel and is labelled "Auto - Normal -TV" . It is S3 on the trigger amplifier circuit diagram (5) and is a 3 pole 3 way switch.If anyone can help please Email me Please give price including despatch to UK. Thanks in anticipation of your replies Peter Williams