Need Help With a Checklist

For the past couple years I've been slowly putting together a ten-card Cubs set from 1989 known as Windy City Superstars.  I believe it is one of the many unlicensed Broder sets produced during the late '80s and early '90s.

 

This is a look at both the front and back of the cards.  They are fairly plain looking on each side.
At this point I've got cards 1-5 and 7-10.  The problem is that I have never found a checklist, so I have no idea who got card #6.

Here are the ones I've got, in numerical order:

 

 

 

 

Both Walton and Grace have two cards, so its possible that #6 belongs to Dawson or Grace.  Shawon Dunston is missing, it could be him.  It could also be any of the name pitchers....Maddux, Bielecki, Sutcliffe, Mitch Williams.

Finding number #6 is like trying to find a needle in a haystack.  Like I said earlier, I've never seen a checklist.  I don't even know if this is considered a set from 1989 or 1990.

Anyone out there have this set?  Got number 6?  Are there more than ten in the set?

Help!!