Ugh! Now you've got me jonesing for a working rangefinder for my Crown. The rangefinder cable broke soon after I got mine (top-mounted), and so I've been using it as a tripod-mounted view camera exclusively.
I use my Crown or Super Graphics hand-held quite frequently in Turkey & Greece, lack of a working range-finder isn't an obstacle. I can work very quicly composing/focussing on the screen first.