I mentioned this place in another thread but there is a gentleman who builds and sells Hi-wheelers out of Alameda CA (Rideable Bicycle Replicas) and has a website for it if you want to google it. But if folk wanted an "authority" on it he is the NorCal top dog for a group called "The Wheelmen" who specialize in these types of bikes - and in fact have groups listed throughout the country, if anyone has the inclination lol