A Space 1999 outfit would be very useful, I think. I never liked that show, but that style of clothing is a bit like the Valiant and Courageous outfits for M4 and V4, which have a ridiculous number of textures out there, that can turn them into all kinds of cosplay items. Babylon 5 uniforms, Trek costumes (everything from Starfleet uniforms to Klingon outfits to Troi's dress), etc.

I do think for that era, you need a matching outfit for La Femme. Women wore scanty costumes in Flash Gordon and Logan's Run (there were no Sandwomen that I can recall, certainly not in the regular or recurring cast). But Space: 1999 had men and women in the same uniform, and I think clothing would be of limited use unless you could dress LF and LH in similar outfits.