I was looking for a travel bass too and wanted a Hohner (I would have kept it in one piece though, it’s to keep in the camper van).
I ended up getting a Hondo Alien bass, it’s dead ugly, but similar footprint, and it is a bolt on. An additional bonus for me is that is has an aluminium neck, which I think is great for a travel bass (albeit heavier). Maybe an option for you instead of hacking a nice bass?