Check out Monastery Greetings. Per their website:
Monastery Greetings is the only catalog-based website that combines hundreds of religious and spiritual gifts from Abbeys, Convents, Monasteries, and Hermitages. Sales of their products directly support them.Gifting for any day for any one, so even if they're not an option for Christmas, keep them in mind for any occasion.
Here are just a few others. This is not an endorsement. I have not tried any of these products and in fact, have not even browsed their websites.
Sinsinawa Dominican Sisters bakery and gift shop
Holy Spirit Monastery Gifts
Abbey Gift Shop
Cathedral-Basilica of St. Louis gift shop (in New Orleans)
Nuns gift shop (Mother Angelica's order)
Mystic Monk Coffee
Poor Clares bread and soup (pick up at their place in Canton, OH)