Getting it repaired is my intention, it's just that I always seem to find other things to spend my money on (or perhaps my wife keeps spending it for me!).
I have an Ansco version of the Agfa Isolette III here and it looks like it has the same size shutter. I'm not going to take it apart though as it's in nearly new condition and was a gift from another APUG member.
I might buy a simpler model of Isolette though if I can find a cheap one.