Any dealer should be able to order them in for you.
Hope made them at some point, as did Thomson, but I don't think they make them any more.
Note - new Lefties without boots typically have the 1.5" steerer or the OPI (spits on floor) system. It's only old lefties and headshok forks that use the 1.56 setup.
It's also surprisingly simple to run a normal 1 1/8th stem with a Lefty using a different steerer from Project 321.
1.56" stem choice is limited, but pretty much all of them these days are, thank goodness, oversize.
I'd start with Cannondale - they are nice and not pricey.
Any dealer should be able to order them in for you.
Hope made them at some point, as did Thomson, but I don't think they make them any more.
Note - new Lefties without boots typically have the 1.5" steerer or the OPI (spits on floor) system. It's only old lefties and headshok forks that use the 1.56 setup.
It's also surprisingly simple to run a normal 1 1/8th stem with a Lefty using a different steerer from Project 321.