interferon-beta ELISA

[Joe Carlin]

Hi,
I'm looking for a commercially available ELISA for human interferon-beta. 
If you know of one, would you please post its source?
TIA,
Joe

-- 
Joseph M. Carlin                  (Spartan at MUOhio.edu)              
Department of Microbiology        (http://www.muohio.edu/~mbicwis/)                                     
Miami University