I'm not sure about the Bilbo's, but you're going to play Hell and a half trying to a track down a pair of those Devil Shadows. Those are some of the most sought after wheels on the planet, and most who have them will NOT part with them for any amount of money. A few suggestions where you might be able to track some similar:
JDM Wheels - An Australian vendor that deals in classic Japanese wheels. Good prices.
Backwheels Bitches - A Malaysian group of enthusiasts that often times sells some pretty rare wheels.
If I find any other possible retailers that I have on the burner, I'll update and let you know. Good luck, man!
Your best bet will be to check on Yahoo and UP Garage. I've written a guide on how to use that if you didn't know already - http://www.mlracing.co.nz/magento/yahoo
We had a set of those Devils in our last container come over.. so nice! Of course customer will not part with them.. but if you find something on Yahoo or UP Garage get in touch we can help to get it to you
A man after my own heart!
I got my Bilbo wheels from Retro Wheels in Indonesia...
I found the Shadow Spoke wheels on Yahoo Japan Auctions.