Update: My dad called the company (hey, he uses it for his business stuff too) and they said they'd be able to restore around 80% of the data, but it's going to cost around $2400. He and I talked, and he basically said it wasn't worth it paying that much. We might try and find a privateer who's willing to restore it for a few hundred bucks, but it seems unlikely.
If worse comes to worse (which it looks like it will), I might just re-download all the templates/bases/etc. I found on various sites. As for the templates I myself made, I'll remake the Meridian Bolt (I really don't want to let Leon down) and maybe the Optic and Axello. The Cavallo and Echo are saved on Sendspace (and Crosby and Landon have them), so they aren't lost.