I used the templates that GeckoTH made and created update decals for all the upgrade cards in the errata of the latest FAQ. These are meant to be used with sleeved cards. They're not the entire card: only the area with the rectified text.
http://boardgamegeek.com/filepage/92996/x-wing-cards-updated-for-07-23-2013-faq
Print these out on adhesive decal paper, trim and then stick 'em on the sleeves over the original card. No more having to keep referring to the FAQ or scribbling tiny words on a Post-It note.
You're welcome :-) Enjoy!