Replacement Switches for audio panel

Hiya,It's been a long time since I posted here but I am finally get around to rebuilding my 'pit.I have a small audio panel which I am trying to match replacement switches for. The main problem is that I am a dunce when it comes electronics.The installed switches are MTS-2 3a 250v / 6a 125v as shown. Q1 is do these have to be 6 terminal switches? Q2 is what can I use for replacements?I plan using a Leo Bodnar USB board to connect to the sim.Any help gratefully received.Rich.