Those rideable replicas (previously known as Boneshaker which was a misnomer as a Boneshaker is a different model bike) are absolutely atrocious. If you use it more than a few times a year, they will fall apart. They use mainly wheeled toy parts. They likewise have geometry that does not correspond to the real thing. I owned one that I rode quite a bit and in the end I had to rebuild or replace virtually everything on it. In the end, I finally purchased an old one and what a difference. From tent point onwards, there was no way that I would ever accept to ride the rideable replica/boneshaker.
If you do find an original, please be advised that Repechage's warning of the dangers of riding such a bike are very real. After riding many thousands of miles on my replica and then original, I took a header and broke both elbows, a vertebra, my front teeth... I believe the best place to buy one in North America is at the Copake auction:
April 12, 2014 Antique & Classic Bicycle Auction