When you say "do a card up" for each person you are talking about the "Supply Centers"? (Those are the large pieces of card stock each player has one which tracks his own resources and weapons, not the def. of SC we have here in Diplomacy.) I think that is what you meant by "commodity cards" right? Because there is also a deck of cards which has "companies" on each card and a few are dealt to each player like a hand of playing cards; these "companies" open up resources and so forth.
Well you sound more experienced than I do about putting games on the web. But if you would like a copy of the traditional Supremacy (1984+) rules, I have the "Version 3.0" rules (in other words, the 1992 printing of the 1984 game rules...I do not think they made any fundamental changes between the three versions they came out with between 1984 and 1992.) So I'll attach them to this post. It's a Word file.
The fly in the ointment would be, as I said, the rules for 2020 are not posted on BGG or on the Command Post Games website. To buy the rights for a "print and play" version of the game, it's $45. (I think pre-ordering a boxed version is something like $150 they said...a little rich for my blood and probably it saves them overhead to do it this way...therefore a pretty good business model IMHO). When Valley Games of Canada came out with their edition of The Republic of Rome they were kind enough to post their rules on BGG...but CPG has not done the same thing for S-2020.
So here are the rules for S-1984 (1992 "version 3.0" box). I should probably receive the game tomorrow, earlier than expected, according to the tracking info.
This at least will give you a handle on the game, and bring us closer to figuring out, how we want to do this.
Crap they won't let me upload it it is actually Rich Text Format or something absurd like that. Here is the link to the zip file it comes out of on BGG: