Seeking Print on Demand Fully Customizable Calendar

[behaviorshift]

Hello - 

We are a brand on shopify looking for a Print on Demand service that sells fully customizable calendars we can plugin to our Shopify website and sell - similar to a Printify plugin.

We have been using LuLu Printing, but looking to find better margins without needing a high MSRP.

We've looked at Gelato, Printify, Printful....but the templates are limiting. We need to be able to customize the day and even add some additional content around the margins. It would be great to download a template, be able to fully customize in Adobe, and upload again for printing.

Thanks!