Dear Sir or Madame,
We search for a Producer for AC/DC Adaptor 
12 Volt 1,000 MA.
If you produce only Adaptors with more DC output you might 
consider to produce the electronic with output 1,000 mA and 
put it in bigger case.
The empty space we can use to connect a Rotary Style Potentiometer.
If you see a chance of cooperation, please contact us.
Best regards,