This isnt exactly the answer to your question but:
www.wheel-works.com/ will convert spoked rims to run tubeless tires (without tubes) which may or may not be all you are looking for.
They are located in california and they list it at $59 a wheel to do the conversion.
As for mag wheels to replace the spoked rims , I sure someone has tried this, give it a little time and someone may post into the thread with relavant details.
[ This message was edited by: durkster on 2004-09-13 01:03 ]