Mellotronists

In a message dated 10/18/2005 5:10:48 P.M. Eastern Standard Time,  
tron@... writes:

You'd be  much less impressed if you ever got to play a Birotron. The
keys are on  springs with about 50lb upward pressure and the sounds are
supremely flat  and characterless, all of them missing any  attack
characteristic.



This sounds perfect for me. Who makes it and where can I get one?
 
Frank