I have been working on some new Wahoo mounts, I was sent a mount for the BOLT version 2. So far I have just duplicated the mounting section itself, and completed work on this, as well as a left and right side TT extension bar mount.

It fits the Trek/Bontrager, BMC ICS and Ritchey Universal Stem Mounts. Because tolerances in printed versions are larger than injection molded parts, this has to be thickened 1 mm and the back end is not quite as sleek as the OEM BOLT mount.