Insulation for 1" water pipes fits the one inch objective on the Ixus
And by coincidence also the door spy
No glue needed
Adjust the door spy so it sits straight. The diameter of the door spy's back end is just .5 mm larger than the opening in the ixus lens - so it won't scratch.
Ixus with door spy. It fits snugly enough not to fall off by itself, but loosley enough to not prevent the power saver feature from retracting the lens. The insulation then takes the shock when the lens falls to the ground.