I'll try to word this carefully so the syntax police don't attack me.
I'd recommend a stop at Rich Burgell's "Lost Vegas Antiques" at 625 LV Blvd. It's about five blocks south of Fremont St. and very near the "Pawn Stars" phenomena. Then there's a place in a small mall of antique shops on Fremont somewhere around Charleston. Maybe someone else can be more specific. Both places are jammed with old Vegas stuff.