I don't know if anyone has created Star Wars cards in the baseball card size, but if it helps here is a link to the Heroes of Star Wars Scape thread. It's a group project that is working through the main characters from the movies.
HoSS
Also, here is a link to the Star Wars Customs thread which has a TON of individually created Star Wars Heroscape cards.
Custom Star Wars Cards
One last link. If you can't find the baseball card size, download MSE and make your own. You'll need the program and the Shieldcrusher and Toolkit add-on. The Shieldcrusher cards are the rectangular baseball card size.
MSE