Manual wanted: Heath DM-1

[A Redshirt]

 Heath folks:

 Help!

 I'm trying to find a manual (or copy of the manual) for
 a Heathkit DM-1 Distortion Meter.  Needless to say,
 I'll pay any and all costs for it.

 Please check those file cabinets, and help me get this
 jewel back on the air!  Distortion abounds, and I must
 find and measure it!  (My wife can probably identify a
 primary source...)

 Thanks for reading
 de John  WB6GHA