"Joe's guitar was hand-built. I use a couple of Fenders that are customized," lead singer Mike Score told KTLA-TV, Los Angeles.
Hotel surveillance video showed someone breaking into the van during the weekend, then driving away in the vehicle with all its contents, including the computer hard drive containing Score's new solo album, the report said.
No arrests had been made.
Notable deaths of 2014 [PHOTOS]
Jason Aldean to extend Burn It Down Tour