I have purchased bone pins in various configurations from Bob - great guy and very knowledgeable/helpful. I make my own nuts/saddles with blanks from LMI. But my HD28 and my 414 CE both have Bob's bone pins, the HD has aged bone/ebony dot, the 414 has polished bone/ebony dot.
FWIW, it doesn't make any difference that I can tell in the sound. On my Martin I have used the oem plastic pins, Bob's bone pins, and brass pins. There was no noticeable change to the sound regardless.