No, there is no "Merck" generic version at this point. Why would they produce a generic and a brand name?
PlanetDrugstore sells Cipla or Dr. Reddy's brand (someone who knows will post on this), which are generics, but not official. I use Cipla Finasteride and it works just fine, but it ain't Merck Finasteride.
Hopefully this clears this up.