[RFI] Mu metal source

[Pete Smith]

Does anyone know of a supplier who sells .2-.4mm thick mu metal sheet in 
small pieces -- say 30x30 cm?  Purpose is to shield against magnetic 
emissions from a CRT that are getting into a high-impedance audio circuit 
located just below the monitor.  It appears from some web research that a 
single sheet interposed between the monitor and the audio circuit will 
offer enough attenuation, but I can't find a supplier.

73, Pete N4ZR
Happy Holidays