I just discovered a place where IMDb discussion boards for Classic #H50 and Five-Zero (2010) are archived. It took me only 2 years to find this, and I stumbled on it entirely by accident. Insert DUH! here if you want!

Classic H50:
https://filmboards.com/board/10062568/

Five-Zero (2010):

https://filmboards.com/board/11600194/