I'm guessing you mean this?
https://www.backerkit.com/projects/mapmage/red-hand-of-doom-5th-edition-conversion-guide-and
I backed it and received the conversion but, to be honest, haven't had a chance to do more than glance over it. Seemed good from what I saw. That said, I'm not aware whether it's for sale anywhere.
Yeah, that's it.
Thanks. Hopefully I can find something more somewhere.