Ah, thanks for saving me the trouble of digging out my own 6300.
 The exact nylon standoffs might be a bit difficult, but the metal parts 
could
  easily be replaced with plain old threaded hex
standoffs.  The original 
metal
  standoffs are press-fitted into place and my guess
that they'll be 
difficult to
  find, even if you do own an appropriate press 
I was wondering if these are pressed in, or if the serrated edge around the
bottom of the mounting indicated some kind of two-part component with a
special tool to screw the two halves together. Sounds like it is a single
part :-(
 The great thing is that the holes for both types are recessed on the 
bottom,
  so that getting a good mounting using a washer-head
machine screw should
 be no problem. I've got bags of aluminum hex standoffs of various sizes 
and
  find them to be invaluable.  Jameco also offers a
somewhat more limited
 selection.
 Here's Mouser's 578 pages of standoff choices:
 
http://www.mouser.com/Electromechanical/Hardware/Standoffs-
 Spacers/_/N-aictf
 So maybe not original, but close enough functionally.
 --Chuck 
I hadn't considered doing something like this. In the end I am most
interested in functionality as long as I don't have to permanently alter
anything.
Thanks for the suggestion.
Rob