I can't find anything, but often online learning places (MOOCs) run journaling classes. Udemy.com is one such place. (And if you get the chance, take a travel journaling class with Dave Fox there. He's a writing pal of mine and I've sat through his classes before -- TONS of fun and you can learn things in there which transfer over to regular journaling, too.)
You might also read this book, which I found very helpful while practicing a new method of journaling:
A list of guided journals can be found here:
I can probably whip up a list of similar classes, when I get a bit more time. Send me a PM on what specifically you're interested in, and when I get back from the g2g I'll write out a longer reply than I'm doing now.