I've begun development of a series of userport addon mounts for Gideon's Ultimate64 mainboard.
This particular mount is designed for the kickstarter/pixelwizard case made from the original 64c molds. It replaces the main board support bracket found in our installation kit, and allows for the installation of user port devices inside the case. The mount will be available on our webshop as soon as it's "production ready". Here are photos of the prototype.