So ASD being the ripe age of 28. The porthole knobs on my PYHI portholes are all broke except one. They are 1/4 X 20 knobs. After doing some research I found out that PYHI was bought by the parent Company Pompanette/Bomar.
I gave them a call today (very friendly folks) and they knew exactly what I needed, however they do not manufacture the knobs any more.
So I turn to the TF community to see if they have any sources for these knobs. I need 10 of them. Pics below.