Hello Bigdaddy51200 and thanks for your reply.
I myself have yet to find a good service in Brazil to print those... what I did was to buy regular cardboard sheet and cut it the exact size and then glue it together. Then went to a local print shop and printed the art. Then glued averything accordingly. Is it perfect? No. Is it acceptable and looks good for display? You bet. I'll try and upload some pics here if DP allows it. As for mini replica boxes, just print it in A3 in a good density paper (not too thick or it will "break" the print on the folds). If you need more instruction, please PM me ok? I have more than what I uploaded at my homepage, just PM me if you need a list as well.