Maybe you can't build a motorcycle quite like Stellan Egeland, but at least now you have access to some of the same exotic components he uses. The Harrier, Stellan's most recent custom, had a very unique look due to hub center steering, which more than looking good, worked very well, too. ISR, a Swedish company responsible for a number of components used by builders worldwide, is behind the steering on the Harrier and based on the excellent feedback from riders who rode the Harrier on both the street and track, is now offering the NS2 hub center steering kit.
Since the Harrier was BMW based, I'm assuming the steering kit will work on BMWs, though there are no specific details in their description. Whatever the case, this could be an opportunity for wider adoption of hub center steering on some custom street bikes, something quite a few fans of the technology will be happy to see. Now you don't have to buy a Bimota Tesi or a Vyrus to get the performance benefits, professional engineering and unique looks of this well tested hub center system.
It will be very interesting to see where this starts to show up. I like it.