@Pdwhite if open sourcing the 3D files isn’t an option, would you be open to starting a Shapeways store hosting versioned 3D printed parts? Might reduce a bottleneck and can experiment with different materials.
Etsy and Shopify accounts not required, you can use Shapeways directly.
Disclaimer: I’m not affiliated with them in any way, I’ve just used them before getting my own 3D printer and had a good experience with their built-in shop features. Think it might be useful here.