[blacksmith_tb]

The Rijksmuseum will let you order prints on canvas for what seems like a reasonable price to me: https://www.rijksmuseum.nl/en/rijksstudio/works-of-art/still... If you hover the 'Scissors' icon in the lower right while viewing a work of art, you can choose 'Order' and then you have some choices of crop, orientation, poster or canvas etc.

[nitrogen]

Unfortunately you need an account to see pricing. It is cool that they eventually will be able to serve US customers (currently EU only).

[SahAssar]

I see prices without needing an account.