I was searching google for printable Uno cards when I came across a few sets that I thought looked really good. These are not the full decks, so I'm not sure if they'll help anyone, but with a little photoshop you would be able to make all the cards. My computer only has photoshop in Korean so I'm not able to edit them.
If you do have photoshop, all you have to do is change the colors of the number cards and change their numbers to make a complete deck. I think for the action card set you only have to print them out twice to have a complete set of those. Anyways, I'm not sure if this will help anyone but if there is a photoshop wizard out there we might have something!