Where do you get paper for homemade inserts?

I buy a lot of inserts but for a few projects I want to make my own. I don't like the feel of printer paper, is there a favorite source for blank paper that folks like for TN inserts?

I love the old Tomoe River paper of course, but I'm guessing that can't be found in bulk anywhere! But maybe there are good compromises, ones that are better than printer paper?