Does anyone know where any good useable knightly artwork or even maps( other than gregs site) could be found?

Dover Books have a large number of books of art work, cd-roms of clip art ec. Thes include a ood slection of medival, Celtic, and faery tale images, orders, illuminations etc.

The best part is that most of these are copyright free or public domain images that you may freely use.

Beyond that a Google image search will turn up all sorts of images, but these may be copyright, in which case you should obtain permission before republishing them.