I will be looking for Sportscaster cards at the National this week. I've never seen promotional items, proof sheets, etc. That is probably because this was a mail order only set, right?
I haven't run across any Sportscaster experts anywhere either. I will keep trying.
I hope to find at least a card from each language-specific set, even though I can't read any of them.
If I see anything good that is over my spending limits I will try to take a picture of the items. Heck, I can't even get Gretzky, Bird and Magic Johnson cards from this set at the price they tend to be sold.