I took Nick Aarested’s Onshape document (which seems to have the same missing parts as anyone else’s) and thinned it out (stripping out things like hardware, the tops of the rockets, and internal rocket structure) so it isn’t total molasses on laptops and the like. No warranty, but maybe it’s helpful for you?
Edit to add: Here’s a half-field version in case you’ve got a total potato of a laptop. https://cad.onshape.com/documents/ee96bc4296bb0c8a27ca53b1/w/29457742ccfd670b0e78a5e6/e/d7f823bd38076f4dad078919