Thinking about lens compendiums, I had the idea that maybe you could make a cheap DIY adjustable one with pipe-cleaners and velvet material.

Here's a poor sketch of what this would look like. Basically, the pipe-cleaners provide the support for the compendium, and you would sow velvet onto them with the black side facing inward. Or maybe you could just use pipe-cleaners for a small "hinge" part at the part of it that would go over the lens, then use something rigid to extend out to the outer part of the compendium.

Thoughts?