To the best of my knowledge, there were 13 different Kenseth hero cards produced from 92-98 and I have 8 of the 13 so far. They are not very easy to come by. So far I have 87 different hero cards of Kenseth and there are many more on my list that I am trying to acquire.
I do have duplicates of some and would be willing to trade if you are ever interested. My email is [email protected]