Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4969788.
Does anyone still have an old NiteBow sitting in a box somewhere without a rocket? Why not put it on top of the ubiquitous 38mm rocket body? (don't forget to extend your launch lugs out a few mm)
The eye bolt is (probably) a #8 or #10 thru - it came out of the parts bin. The four mounts for the lower board are for #4 coupler/extension nuts and need to be heat-set (hexagonal opening is slightly undersized when printed).
And, of course, you'll want to throw a bit of foam or wadding next to the battery to keep it from wandering a bit during aggressive flights.