A Japanese tuner has built this real-life version of Akira's motorcycle on top of a Honda Bick scooter. I got the impression that a company might be selling a kit you can purchase to do this yourself in the future, but I could be wrong. They've got about another 14 years to pull it together.
Update: Brad Douglas has all the details after the jump. It looks like there is, in fact, a kit.
I just thought you'd like a little more info about that story. According to the ITMedia article, it's based off of the Honda Fusion (http://www.honda.co.jp/motor-lineup/fusion/index.html). There's two (well, three) types for sale. A new Fusion, pre-modded will run you around Y1,155,000 (that's in "Fighting Red" color). One that is painted to look more like the real (?) thing is called Kaneda Red and that will run you Y1,470,000. If you already have a Fusion and you just want the body kit, the bolt-on kit will run you Y630,000.
This is all put together by Saitaniya, a custom parts maker out of Osaka. They've been working on this for over a year, trying to get a kit that would be easy to put together and also not cost an arm and a leg. They say that if you can change your own muffler, then you can assemble the kit.
The other thing is that they haven't gotten any kind of OK from Kodansha, the publisher than owns the rights to AKIRA. According to a guy from the custom parts maker, "We haven't spoken to anyone from Kodansha. If you look closely, you can tell, but this isn't the "Kaneda Special". It's nothing more than a custom parts to make your Fusion look "Akira-esque". If we get the OK from Kodansha, we plan to get more detailed and that's what we're currently working towards."