[Motorola] chip needed

[Ken Cechura]

where can I get motorola MC1723CP   1K8409  linear voltage 
regulator?  These were used in Astron 35M power supplies....  we have one 
with a bad regulator, Astron does not answer telephones, and their email 
box is full.

any help would be appreciated
Ken

      //////////////////////////////////////////////////////
     //        Kenneth R. Cechura, KC9UMR                //
    //             kcechura@umr.edu                     //
   //           President, W0EEE, 2002                 //
  // University of Missouri-Rolla Amateur Radio Club  //
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