I ordered a few custom decks 2 years ago for our french forum from yourplayingcards.com
You can choose your index and have a custom back, but they are poker size.
Some pics :
The printing was pretty accurate, without blur.
We had a problem with the first ones, as the black color was very fragile, at a point that someone could mark them with a fingernail by inadvertance.
The problem didn't occur with the gold cards though, so I can't really say that it's a general issue.
Hope this helps.