They used to sell them in the stores (Target, Wal-Mart) for $19.99 that had that had all the part choices you have at Disney, but you could build and rebuild it differently each time.
DS7 had one--they do not hold up at all. That thing broke so fast we actually returned it. Happened again with the next one. We learned it was the light saber and we didn't just have a defective one the first time. We wrote a letter to the manufacture that sent us a letter of apology and some figures for our trouble.
I cringe every time I see them at WDW. Same money, not as much to it, and no quality.