Anyhow, I've been looking over the C specific beautifiers and it appears that, while they do what I want, they're not written in Perl so I can't really plug them into where I want them to be used. So far, the most promising ones turned out to be executables and/or something that's native to the language they're cleaning up.
Of course, I haven't had a chance to examine every last link I found so I'll come back later once I go through them all.

Is it fair to stick a link to my site here?

Thanks for you patience.