Dual linear attenuators
The EMW Linear Attenuators module is great for controlling the level of an audio signal, a general waveform or control voltage. Signals patches into IN1 or IN2 will suffer an attenuation that can be adjusted from zero to infinity. An extra 4-patch connections is also present to expand the module's usability.
http://www.electronicmusicworks.com/detalhes.asp?id=91&produto=67&loja=EURORACK
No info about availability.
$46