I'll try to see if I have other suggestions, but for right now: L and Tex have just decided to try to build a dry shooting system (i.e., something for target practice that uses no ammo, similar to what's described here) that uses laser sighting and sensors to tell you if your target has been hit. They've been planning to see what supplies are around the ship that they could use, and maybe to adapt the existing scoring system that the shooting gallery has to this purpose, since it also involves small lasers. However, if they could find this kind of item at this colony, or if they could easily find the components to make it, they wouldn't run all over the ship looking for supplies.

So I think they'd like either some kind of weaponry shop or some kind of electronics building and repair shop! Or both.