probably a typical import strat trem bar. There are typically two size screw in bars, a import size and and american fender size, I would guess these use the import size. Although they could be something unique to LTD but they are probably not. The bars should cost $10- $20 range.Take the guitar to the store and ask to try one before you buy it. If a standard off the shelf replacement doesn't work get your local ESP dealer to contact ESP and see if you can order a replacement.