I've updated the links in this post recently to redirect them to my new online store. I've been rethinking the way that I share my work recently and have decided that, at least in these cases, I need to charge a nominal fee for access to the hi-res files.
There's a silver lining though. Shortly I will begin developing a series of stand alone adventure sites for tabletop RPG's that can be easily integrated into a wide variety of game systems. "Schleyscapes" will include everything from gorgeously huge top-down battle maps to isometric cutaways and story inspiring landscape illustrations. Designed for home printing or virtual tabletop use, these packages will approach gameplay environments in an entirely new and rich way.
More on my decision to rethink sharing methods here - An open letter to fans of my work.