Clyde, CB seems to think that those mixed bags were one of a kind and only put together for the advertising campaign. I'd be interested to know if anybody, other than the folks who were there at the time, has ever had one in hand. I have the same 100 ct bag and header but it has all St. Mary's Alleys in it.
On another note, is it odd that I don't see any trace of a verticle seam on the advertising card bag?