In brief
Details
While it's possible to wire up the haptic actuator on the side and tape it somewhere, it'd be nice to integrate this with the Tundra Tracker enclosure directly. At the time of my order, Tundra Labs shipped the right haptics actuator with the IO Expansion Board, I'd just need to solder it on.
Looking around, I've not found any existing shared 3D printable enclosures that could hold the haptics actuator.
I noticed your hidden Ongoing Research
wiki page mentions this is under consideration. If there's anything I can do to help that research, let me know. I'm handy with electronics, though I lack a 3D printer (I can use services such as Craftcloud if needed).
This project seems to not be too Windows-centric, either, so I'd be happy to try to help with getting it working on Linux as part of this.