Anyone selling one or have a lead to purchase a similar mount? Looks like Inventables did not pick up this part when they took over TBD.
Openbuilds and Amazon sell heavy duty spindle mounts that you could probably rig up for the x carve.
Router / Spindle Mount - OpenBuilds Part Store
This looks interesting
2 Aluminum Spindle mount Carriage 65mm Diameter For X-Carve MAKITA RT0701C DIY | eBay