Legally... You scour Ebay, Craigslits, Kajiji etc. and hope to all powerful Aetheismo that someone is trying to sell the WD (can't remember the numbers, was over 2 issues) and then likely pay through the teeth for such a rare gem.
It was only released through the 2 issues of WD, so if you can't find them, your SOL, unless you want to resort to being a shifty Hruud and roaming the more nefarious parts of the interwebs.