Try here. On the forum there are listings for a lot of great profiles. Enjoy the xf300. I still find myself using it a lot for theatrical work. I can't get a better image off of any other camera, when their is good light. Not great DOF but that's to be expected.
but, when I click on that link, I see some videos, etc and even after joining the group, can't see where you'd download these, etc...
Just curious, what settings you tend to like with the 300? - I'm trying to even out some of the differences when we shoot in very harsh light and the girls are in flashy outfits, etc... I saw the new 3 profiles, which I looked at with the new firmware, and liked the HDR one a lot - esp for outdoor stuff. I think the other is Wide Gamut or something? - the 3rd is s/n - didn't see much difference in low light with that one.
Sorry. I've not been back to the Vimeo xf300 site for a while, but it appears that they have killed off the forums. Brian Weed was the guy who created the best bunch of profiles. You might be able to find them by Googling his name, xf 300 profile and maybe DVXuser forum. They have pointers to the old Vimeo site, but also discuss camera profiles.
Google this: canon xf300 custom picture profiles
Brian is still listed on Vimeo, but he hasn't done much personal work there lately. He may be working as DOP in LA. Good guy. Ping him directly, I'm sure he'd tell you where to find them.