[Heathkit] HW-101 questions

[Mark Nace]

Hi, I'm new to this reflector.  I just bought an HW-101 and have a couple of questions:

-  Where can I purchase a mic plug that fits?  
-  Is there a particular construction/operation manual serial number I should search for that matches the production of my unit?  
-  A sticker on the back indicates that 6146A's should only be used.  Is this a strict rule?  
-  Lastly, is there somewhere other than ebay that sells the 11-pin male and female power connectors for the HP-23A power supply?  

Thanks and 73,
Mark
N5KAE