Your point is well made lazer - most of the available glyph sets are indeed intended for web pages, and don't scale well. I must admit to having used/abused the Delphi images, even if only as a starting point for editing, both in Delphi and Lazarus.
There used to be several really good Icon designers/resource grabbers available, although my experience is ONLY with Windows versions. Maybe a worthwhile project for the Lazarus community?