Your best (although costly) option is get your own FMS2 box and build your own. Takes about 3 hours to get one up and running, and after the initial $5k to get the box built and license FMS2 it costs you only bandwith (which can be monitored in real time and throttled if necessary).
http://www.adobe.com/products/flashmediaserver/
Call me and I'll tell you how we did it here.
edit - just realised you probably don't have my new number, I'll text it to you or find you at RNG this weekend.