If you have guidelines and samples that are obviously not markets for you, there is no sense keeping them and cluttering up your files. Pass them on to a writer-friend or simply discard them. If you move into that area of interest in the future, you will need to get current guidelines and samples anyway.
Another source for market information on these publishers is their Websites. Most book publishers, and periodicals now have their own sights. Many have guidelines available on the site that you can simply print off for your file. Many give you background information on the sponsoring denomination or organization, as well as sample articles from their publication or a list of upcoming book titles they are publishing. This is fast becoming one of our most valuable marketing tools.