Quote Originally Posted by MDR View Post
Holgamods has an example of a new shutter for the Holga http://www.holgamods.com/shutter/shutter.html
i actually spoke with Randy at Holgamods and he does install a Polaroid Pathfinder shutter into a Holga. However, the vignetting is apparently fairly serious (like looking through a tunnel) and much of the film area is lost. So I decided against getting one.
If you're interested contact him, he's a nice guy.