I needed to do this anyway, so spent far too many hours today looking for these parts. Generally they are available but I had trouble finding the pins in a reasonable quantity. So I did source some alternatives:
Molex 39-01-3045 (black) = Molex 39-01-3042 (white)
Amphenol 10127716-04LF (black) = Molex 43025-0400 (natural)
Amphenol 10127718-001LF = Molex 43030-0001
I just ordered some today so I can’t confirm they will work properly. 10 housings and 25 pins each = 7.85 + shipping.
Once I get them in I can report back.
-Tom