Sure, lots of them. Now, many of them are still hypocrites, in that very often a model will claim to address something as a top priority, but not actually address it. (Ed: not a hypocrite to propose a model that doesn't work out; hypocrite to continue to claim it will work when errors are discovered or it can't help, even in theory.) Which is why I called Libertarians so -- they bark about externalities when their model is fundamentally about not being accountable for externalities of coercing others to obey your model.
However, the dishonesty of American Libertarians stems from something further than that. Namely, American Libertarians are neo-feudalists in practice, but won't own up to being neo-feudalists.
I find this to be dishonest: they, so far as I can tell, have done this purely because they want to advocate neo-feudalism and its benefits without having to justify the benefits in terms of the costs, so they use terminology where it's harder to find the costs in academic literature and deny that any such costs exist. Nothing different than creationism rebranding as "intelligent design" or anti-abortion as "pro-life".