nc302 diode

This diode is manufactured by Noise Com. On their web page, there is a list of Global Sales:

http://www.noisecom.com/reps.asp

If you don't find one in your area, you can always contact the HQ:

Noise Com
25 Eastmans Rd.
Parsippany, NJ 07054-3702
Phone: (973) 386-9696
Fax: (973) 386-9191
Email: info@noisecom.com

I think they are in the S20-S30 range for diodes without any RF test data.