Just because Target is paranoid about being sued does not mean you are actually in violation of anyone's copyright. There is the doctrine of Fair Use.
From Stanford's Fair Use and Copyright website:
"Unfortunately, the only way to get a definitive answer on whether a particular use is a fair use is to have it resolved in federal court. Judges use four factors in resolving fair use disputes, which are discussed in detail below. It's important to understand that these factors are only guidelines and the courts are free to adapt them to particular situations on a case-by-case basis. In other words, a judge has a great deal of freedom when making a fair use determination and the outcome in any given case can be hard to predict."
If you paid for an image (ie bought the deck), and you want to put the card itself up on your wall, no one can stop you. If you want to reproduce it at larger size and put it up on your own wall, it is very unlikely that a judge would rule against you. For example, if you could draw, even though to re-draw a copyrighted image and publish it would violate copyright, to re-draw it for your own wall is unlikely to get you in trouble.
Target is at risk because THEY are making money to reproduce the image. But you are just putting an image you paid for on your own wall, not making any money from it. You're unlikely to ever be sued, and even less likely to lose in court.
Therefore, if you can get a target or similar store to reproduce them, I'd say, go ahead and do it. If you happen to invite Stuart Kaplan over and he gets mad at you, all he can really do is insist that you take it down and threaten to sue you if you don't.
If, however, you are using a deck whose artist sells prints, you're at greater risk, because by doing it yourself you are encroaching on the potential market for his or her prints (ie you should have bought one...)