I have a very simple solution for when I need more copies of a mage wars card.
Its actually something Ive been using for Magic the Gathering for several years when I want to use an expensive card in several decks.
I simply use a multi function scanner/printer and make copies of the cards with premium paper. Then I cut the copy out and slide it in a sleeve with a real card behind.
For magic its really simple since those cards have a black (or sometimes white border) When making a mage wars proxy I just cut the copy ever so slightly smaller than the actual card to prevent a white edge on showing on the backside. (That only really matters for enchantments tho)
This does require you to sleeve all cards, but I do that with all my games anyway. Im somewhat fanatic when it comes to preserving the condition of my games.
So far its mainly the staples of all decks that tend to run out, or some promocard that I only have a single copy of that Ive had to do this with. I bet Im not the only one whos been annoyed at not being able to build another deck without dismantling a previous one because you need some more dissolves.
Anyway if you use matte semi photo paper and a good printer you get really good copies. If you put one next to an original you can see a slight difference, but most people I play cant even tell my proxys from a real card unless I point it out. Its also less problematic for mage wars than for magic since you cant cheat by spotting wich cards are proxys from their thickness while shuffling.