Ask HN: Seeking print fulfilment API for spiral bound calendars

Apart from Apple's offerings, which are only available for Apple users, I'm generally very disappointed in the range of personalised photo calendars I can buy online. They all struggle to produce something simple and elegant — even when I choose an all-white theme, the calendar bit generally looks like a print from an Excel spreadsheet. So I was looking to see if there was a service with an API I could send a PDF + shipping address to, and have a spiral-bound wall or desk calendar printed and shipped. Then I might see if I could create something better (kinda hypothetical at this point, though I do have experience generating PDFs client-side). Anyone know of anything? Bonus points for UK/European options.