Bike Bandit has them, OEM, entire peg assembly only:
link. The left foot peg assembly is listed as $55.55. There may be other sites offering them, as well -- it pays to shop around. Check with a Honda dealer/parts shop, as they may be able to order just the piece(s) you may need, for less. Cheers!
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII