Hi and welcome. No idea about baritone string length, but I'd have thought any baritone string set should be long enough. The more common 27" baritone scale is only 3" shorter, and you'll normally cut far more string length than that off on standard length strings on a standard scale guitar.

These state they are for 'longer scale baritone guitars" https://www.gear4music.com/Guitar-an...r-Strings/2H1R

If necessary, you could always fit a set of locking tuners so you don't need the length to wrap around the posts (the Northwest Guitars locking tuners are decent, though the posts are taller than they need to be https://www.northwestguitars.co.uk/6...r=Yes&brand=10)