The Harley Davidson FXB Sturgis was, perhaps, one of the most similar bikes to those seen in the movie Easy Rider. The actual bikes from the movie were never really produced for sale to the general public. The ones that were used in the movie were ultimately destroyed, though at least one was refurbished in 1996 then sold at an auction for quite a sum.
I think the Easy Rider "choppers" (as the bikes were called) were all stolen and / or destroyed after the movie filming. I don't know of any such bikes (or similar) being sold to the public. If anyone has one, its probably the result of heavy modifications / tuning of something else. As I think these choppers were.