In lieu of CAD drawings, can someone with a prototype take some measurements of the exterior chassis along with photographs of the edge of the device that has the TB3-enabled USB-type-C port?
I need edge thickness, height, depth, USB-type-c port placement with respect to width/depth on the edge, and the placement of other ports/buttons in case there are any protrusions that need to be accommodated in the design.
I can whip up a quick design, print it, and ship it out to someone to test it out. Or if someone has a prototype in the USA they can loan me, I can take the measurements with a laser and get it back to you pretty quickly.
CAD drawings would be best though as it would afford me an opportunity to work at my own pace.