I remember seeing a few in an auction a while back. Two things I recall:
Very few of them are full rectangular pieces; they have cutouts for filming which detract from them being pieces to hang (though that’s a matter of preference)
Yeah okay, the auctions for originals was all I could come up with when I went searching. Seems a shame if prints weren’t made. I wish star trek was better with that sort of thing, can’t seem to go shopping anywhere without tripping over star wars merchandise.