At the end of 2005, Springer published The Selected Works of Arne Naess, in ten volumes. The second volume reprints Naess' famous book Scepticism, originally published in 1968 by Routledge & Kegan Paul. Unfortunately, it is not possible to buy individual volumes separately; one must buy the whole set, whose price is about 1,900 bucks. Naess seems to have been among the first contemporary thinkers/scholars to take Pyrrhonism seriously.
A final note: there's a very critical review by Barry Stroud which appeared in The Philosophical Review in 1971 (it is a review of the 1969 edition; the link is here). I wonder whether Stroud still thinks the same way about Pyrrhonism.