nemeth still have it for sale even after they shut shop, I would strongly avoid buying it, it doesnt work correctly in fsx as ive tried it and they stop providing support on their forms since in Jan 2015 when that was thier last post from any developer or spokesperson
there are 2 MI8/17 in product like hank said Cera is doing one and MP Studios are reported to be doing one as well,
from my experiences with cera, very difficult to fault my only grip is some minor texture warping in where some mapping meets thats it and its sometimes so small, only painters get frustrated and notice these things
as for the MP Stuido models they claim to be all this an more, i have 2 of the 3 they have released, and im not impressed with them, the helisimmer group rated them too high in their reviews, I dont know why or how, but it is what it is, they are fs9 quality texture wise as im more than confident they dont understand the every day modern fsx and p3d tech features like bump, spec and texture sharing, and the rotor animations are very dated considering its 2017 not 2006 and many people cant replicate the so called advanced features the package contains
but there are a few successful freeware port overs from fs9, again they are low and dated quality but do work
I personally would wait for cera