Jamman memory chips, where?

["Raul Bonell Tomas" <rauboto@eui.upv.es>]

dear friends

  I'd be very grateful if some among you should tell me
  where to find (net shops!?) the memory chips for 
  upgrading a Jamman.

  Sorry if this has been asked various times before, 
  but I couldn't read the info.
  
  I supose, private answers are better this time:
           
                 rauboto@eui.upv.es

  Thanks in advance!

  raul.