Custom made racing wheel

[Bikecub16]

Hi all, I am planning to design and make a racing wheel, to fit to the base of my Logitech G27. I am wanting to buy a basic rim and then fit an aluminium frame to the back, giving me space to fit buttons. I am also planning to use an arduino, raspberry pie, jemma - that sort of thing - to make it all work and to make an LED board that has a rev counter and what not.
Long story short I'm hoping that someone can recommend an affordable yet high quality rim to use.
If you have any suggestions then I'd be more than happy to hear them!