Myself, if someone could consider 15mm 'modular' deck tiles to be able to construct facsimile interiors of the various starships which have available deck plans.
Specifically engineering sections, airlocks, hanger-cargo bays and of course staterooms.
I'd be quite content if such were just resin cast or injection molded pieces that would represent the 'furnishings' found aboard a typical starship, command-crew chairs, galley tables, bunks of various styles, etc.
Best I've managed outside of dedicated gaming miniatures has been HO-scale model railroad accessories for just such 'set' dressing needs.