It's from an issue of Excalibur, I know that much. Somewhere in the 64-67 range. Sorry I can't be more helpful than that, but like you said, it's been a number of years (before we had the template for sourcing it, apparently, since 99% of the stuff I uploaded after that was sourced). Looking at it, it looks to be from the issue where they revealed Kate to be Widget. I just can't remember which issue that was.