Townshend Seismic Sink power supply

I have an old Townshend Seismic Sink (Model 405-2HD) but lost the power supply. Townshend did not respond to my request for information on a replacement (so much for customer service). Can anyone give me the specification (most importantly, the output voltage) of the power supply so that I can buy a replacement? Thanks.
I have a 2HD. It came with the Wisdom AC/DC adaptor. Input: AC 117V 60Hz; Output: DC 12V 100mA.
Thanks for the info! That's exactly what I need.