I write a lot of patterns for Knit Now magazine, and while the rights revert back to me within a few months of publication, it can take me a while to get round to adding them to my Ravelry store (I need to reformat them and add my own photos, which means re-publishing often gets put to the bottom of the to do list as these things are time-consuming!). One of the questions I get asked most frequently by customers is how to get hold of the patterns I have published in Knit Now before I self-publish them, but after the print issue is available. The answer is to buy the digital issue of the magazine.
Digital issues of Knit Now magazine can be purchased through Pocket Mags, and allow you to read issues that are no longer in print. Pocket Mags has a handy page of digital magazine FAQs here, which may be helpful to you.
I do hope this post has been helpful. And I am currently working hard to get all my third-party publications up in my Ravelry store.