I just found another RallyMan Switch.
http://cgi.ebay.co.uk/1960s-WIPAC-SPOT-LAMP-SWITCH_W0QQitemZ230250033958QQihZ013QQcategoryZ9903QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
I have no idea who the seller is but the switch looks good.
Andrew
http://cgi.ebay.co.uk/1960s-WIPAC-SPOT-LAMP-SWITCH_W0QQitemZ230250033958QQihZ013QQcategoryZ9903QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
I have no idea who the seller is but the switch looks good.
Andrew