You have to believe Disney and LFL are highly aware of this. If was running LFL, and a licensed company came in to produce a mold from the screen used Boba Fett helmet (an example), and in the 5-7 years since, haven't produced an item to sell at retail, go in and seize all molds and casts produced. ...and especially seize all personally produced casts from those molds, considering they aren't a part of the licensing agreement.
However, if personal casts was a part of the licensing agreement, then it's moot - but I can't image LFL would have approved such an agreement.