Cryptome's page of TEMPEST documents, most of which are declassified NSA docs though there are also mirrors of TEMPEST info from the private sector. Also has a very interesting discussion of how STU-III phones can be accidentally compromised by stray RF. Oops.
This company sells conductive fabrics, woven not out of fiber but very, very fine wires. They seem ideal for sourcing primary components for building shielding - say, you're constructing an RF testing facility and you want to minimize leakage (or intrusive external signals). Or you're building yourself a Faraday cage for some reason.
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