Journaling Arts is a great resource for all sorts of journals and planners. Their shop is organized by type of book: writing, art, travel, planners and more. I especially like the category for Journals for Fountain Pens. You can also search by brand and Journaling Arts stocks a dizzying selection of Moleskine products. Journaling Arts also keeps a blog which is a good resource for detailed product information and techniques for creative journaling.
Collector and creator, Lisa Congdon, has collected quite a few other vintage office supplies and art tools so definitely inspect her whole collection. I do hope she publishes a book of her collection at the end of the year. I just love the composition of the photos.