The only place the solution is revealed is the old forum. Google didn't index the solution because the Off-Topic subforum was not visible to the guests (and web crawlers), so I logged in and found it easily. You could do the same, but if you'd rather do this as a challenge (it's more fun that way!), here are some hints for you:
- retrace your steps, you were headed in the right direction, and your suspicions are correct
- see Leo's first reply at the following link, and take a very detailed look on his screenshot, there is a clue (not immediately obvious) to the artifact you seek: Dopus crashed and the pirate cat appeared - #2 by Leo