I am working on that, but at the moment I am more focusing on doing live models with costumes and props. It is far more engaging. I have done it before for several other projects and clients, and see it as a logical step for traveller.
It must compete with Star WArs, and the like, and they have a jump on us, as they already have books filled with pictures of what thier gear looks like. Most of it, you wil notice, is terrestrial stuff with things glued to it. Only later do we see props being made form scratch (other lightsabers, queen amidala's gun) but they are kind of boring, as they look brand new.
Something like this for me brings all skills I have into play. I have a background in Fashion (I make stuff, and set up big shows) and merchandising, as well as physical prop production.
There are several companies and sources of off the shelf gear would serve for many things. Several new companies (like old navy) produce simple, plain, clthing that is easily jazzed up into Vacc Suits and such, with a touch of imagination. Money of course is an object, but there are always production overruns in the field I'm in. For example, the Kid show I am working on now is also funding my full scale Hiver.
Luckily, I also in the past did displays for a pretty big regional army navy store. I must have handled every uniform from the former Eastern Block Militaries and others, and thier (non-weaponry) gear.
Problem 1: Models. In New York, it is easy as sneezing to find pretty people that want to have thier picture taken. Here, where I live now, folks tend to live a bit more naturally, with less attention paid to personal appearance.
Good Topic!