DIODE 8473D of the EMC Test artifact for radiated immunity

hello everyone!

My question is about The test artifact for radiated immunity by Ford EMC.

I'm doing it but the required diode* is very expensive. There is another way to do the artifact using a similar system to request from diode?

There is outher manufactures to the diode?

*DIODE 8473D;
Manufacturs: Agilent
Datasheet: http://cp.literature.agilent.com/lit.../5954-8878.pdf

thanks!