Last December they had a CM posted at the Tatooine Traders (DHS) store helping the kids make their lightsabres behind a rope. It's a small display - would be easy to miss if you didn't know what you were looking for.
We made them at Once Upon a Toy at DTD instead because we didn't want to have to haul them around DHS all day and knew our kids couldn't wait to have them delivered to the resort the following day. The display there was at least twice as long and double-sided so more people could work at the same time.
As PP have said, cost for single-swords was $20.
Have a great time at Star Wars Weekend!