Use PreDesigned Pages for Calendars

Hello, a few of my clients and myself would like to create calendar pages by inserting a pre-designed page template. Currently we have to create a new project with custom pages, save as jpgs and import into the calendar. Besides more work this also means we are having to save two projects when really we only need one. Currently you can only insert paper so there is no need for my customers to purchase 12x12 templates or predesigned pages.

Thank you