Uh-oh, you might be SOL: I think PT Woody only has the 'contact paper' styles, and in your picture it looks like you have the ABS plastic panels.
Which piece(s) fell off? Something like the small spears in front of the doors, or one on the 'B' pillars, where you could just remove the matching piece on the other side to even things up again? (Oh, and you've probably already thought of this, but: check the rest of the pieces. I've had mine about five years, and had two re-glued, just to be safe.)
And as far as California Cruisers goes, did you try there in person? Just emailing or phoning them has NEVER done any good: they've always been notorious for ignoring the people who do either one. (If they ARE closed, nobody on this forum is gonna miss 'em!) Good luck!