While I am not aware of any BoL/Traveller mash-ups aside from Barbarians of the Void, I do recall a Star Wars fan effort from way back. These are the only two BoL in Spaaace works I can recall.
 
However, while it doesn't help you now, I should mention that Garnett Elliott is working on a supplement called ‘Space Pulp’. Unfortunately, aside from it not being published yet, it is not a BoL supplement, but a supplement for Everywhen. But when it is published it should be easy to convert back to BoL from Everywhen as they are both BoL mechanics games.
 
Mr Elliott produces excellent work, and ‘Space Pulp’ will allow you to produce most sorts of SF settings aside from hard sf. As well as that the supplement will feature four settings, one of which ‘Dirty Plastic’ seems closest to Traveller in it’s space truckers mode. Garnett has released beta bits and pieces of what he’s working on, which he shared on MeWe and also Facebook. The inspirations for ‘Dirty Plastic’ are given as: Alien, Aliens, Neuromancer, Silent Running, Outland, and numerous classic and indie rpgs.

Last edited by Gruntfuttock (Today 4:06 am)