It wouldn't be surprising if he starts selling those sometime in the not so distant future. He's a member here, and has a good independent vision of what any bike can become, given the right care. Personally I think he's building quite the catalog, a very Arlen Ness or Mick Jagger-like move to say the least.
But YES! pipes like that, that run the header under the bike and out the sides to the mufflers, it would have to retain oil filter access to a stock filter housing, and retain drain plug access, as well as mount to the passenger peg mounts and leave plenty of room to pull the rear axle. Oh removeable repackable baffles would be a nice touch for tuneability too.
I can see the price growing.....