The best solution for cleaning the fungus from lenses (that I've found) is a 50/50 mix of household ammonia and hydrogen peroxide. I will work in other areas too, I think best on the metal and leather body parts of the camera.
Remove the lens if you can. I'm not sure I'd use this on a bellows but you might try wiping down the body and the body leather with it on a paint brush. Let it dry in the bright sun for a while. This has worked very well for me on the bellows (yes I used it) of a Super Ikonta as well as the body and lens. I then filled a old, clean sock with ground coffee, put all in a plastic bag and let is sit for a week. This seems to have worked for me quite well.