You can find Honeycomb Nomex at:
www.dupont.com/nomex/index.html

They have a where to buy index I copy the Europe Section:

EUROPE
DuPont de Nemours International S.A.
P.O. Box 50
CH-1218 Le Grand-Saconnex
Geneva, Switzerland
Tel: +41-22-717-5111
Fax: +41-22-717-6218
e-mail: [email protected]

e-mail them maybe they can assist you or send you with someone who can, let me know if they sell it to you direct its an interesting product I would like to try.