I was suggesting “go full wood”, you basically need three parts:
- ears (red arrow)
- spacer (purple arrow)
- shorter arms (green arrow, and I’m not sure how the Suckit Pro looks like so that may not be valid)
For the ears, I’m unclear how one would order one set these days, but the plans are available and I think wooden ears would work just fine.
For the spacers, drill two blocks of wood and you’re good to go. You could pick up the dimensions from Brian’s STL files.
For the arms, either hack your Suckit arms as I did (which is risky, you get one shot 
), or just mill new ones.
I guess I’m saying, it’s doable as a simple project, but I do understand that it would be more convenient for you to just buy those parts, maybe someone knows where to get that (or has a secret plan to fill that niche market )