I liked the fit of the Reasonably Universal Controller Hook for IKEA SKÅDIS Pegboard design for my steam controller, but it did not fit in the Skadis pegboard correctly and the peg holders on the back were too tough to print.
I remixed the design to add a couple of square holes which fit the Skadis Universal Hook so it can be printed out as separate parts. Now it fits nice and tight on the pegboard without wobbling and without needing to sand down the hooks.
You can download it on Thingiverse. You will need to also print two of the Skadis Universal Hooks to attach to it.