During my move, I lost the special speaker wire with the proprietary endings to plug into the 5000 receiver and the B&O speakers. Do you know where I could buy this.

It depends which ones you mean. If it is just for the normal speakers, maplin does them. If you need the 3 pin MCL plugs for link rooms, you need to see your dealer who can get them.

These are the ones which have male at the receiver end with flat pins positione like so - |

and female at the speaker end with holes like so - |   

They are 2 pin DIN male and female plugs. You can get them from your dealer as a made up lead. Not sure about suppliers in Canada for just the plugs.

Peter:

They are 2 pin DIN male and female plugs. You can get them from your dealer as a made up lead. Not sure about suppliers in Canada for just the plugs.

Thank you. BTW I am in Prague (having moved from Toronto)