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Just purchased the game in 2021 - Still no reference card or maps with the game.
If you type "Ultima 1 command list" in Google, it will take you a site with all the Ultima information you could as for.
Don't think I've ever seen a digital version of the Ultima I Reference Card for PC. However the following links should fill the gaps:

Maps (.pdf): (Manuals: Ultima 1 Remake - Maps)

Reference Card (.pdf): (Manuals: Ultima Trilogy - Reference Guide)

Here's a picture of what came in the box of the PC version of Ultima I remake (the version sold on GOG):