Cheap wireless adapter

Anyone know where I might be able to get a cheap wireless adapter for the original Xbox? I recently soft-modded mine and would like to stream videos to it on my TV upstairs. Any advice would be appreciated. Thanks in advance.

http://www.consumerdepot.com/products.asp?id=B4B00009V

Thats the cheapest i can find but they let you make a cheaper offer. It worked for my 20gb HD got it for $39.99 you could probably do the same with the adapters.