Not sure if the clips for G are the same for a K, but I bought a few from this firm years ago:
RJ&L Obsolete Automotive Fasteners & Vintage Wiring Supplies
PO Box143
Penfield, NY 14526
315-986-7121
Ww.rjlautofasteners.com
Their website is still active, but there is not specific product information on it.
Good luck and Happy Thanksgiving!
John Spiers
Florida