There was art created for the Nintendo Satellaview that was broadcast, it wasn't part of the download package, so the only way we have them is because someone recorded it on VHS, saved it, and got it online. The source for these is Makuchan on YouTube. You can find out more about the games from the BS Zelda Homepage.
I had some of them uploaded but recently went back and searched for any I missed. I believe I found 3 more. I have them next to their watercolor images that are (mislabeled and) in the Zelda 1 section of Hyrule Historia. The watercolors were likely done by Yōichi Kotabe.
Screen Capture by Melora of History of Hyrule
