Hi Sandy,
My name is Anne, on the Guru team. Thanks so much for getting in touch with us on the forums!
I had a good luck through all the printer apps in the app store, and Printful one has the most products as per the image below! You can check them out here- https://apps.shopify.com/printful
Image may be NSFW.
Clik here to view.
I couldn't find any that do stationary at all right now, hopefully someone will come along with this kind of the app in the future!
I hope this helps!
Warm regards,
