I would get something like tracing paper, open the back of your camera, put the paper where the film would go, open the lens and view it under a jacket or something. sketch roughly the scene. Do that for each lens. Cut a card with a 6x7cm aperture and work out the distance for each lens you need to hold it in front of your eye to get the framing. It will only ever be approximate, but you might be surprised at how well it works.
Then on return get if fixed and buy a backup camera.
Or if you can find one for sale online, buy it and get it sent next day delivery, whatever you do will mean spending money or giving up photography.
Kevin.