Seems there was a thread awhile back in one forge sub forums about replacement knobs.
I ordered the short knob with my bighorn origin.
Little too short for my liking. So i was going to order another from bighorn. But i wouldnt go for the $15 to ship a $50 knob.
Found The Polished Knob.
Samuel made one to my dimensions.
Skelton bolt cerakoted black.
I recommend him for someone looking for a replacement bolt.