After reading what you are trying to do, my first thought is to use a Canvas type widget, since you are talking about resizing components. For instance, a Tk Canvas, and all other Canvas type widgets, will let you programmically draw and resize widgets, and the advanced Canvases will let you zoom, as in Tk::Zinc.

Anyways, a Tk canvas will let you construct your custom gridwork, fill it in with appropriately scaled fonts, and export the whole thing as a pdf. See Tk Patio/Office layout designer for example.

However, if this is running on a server, Canvases need an X server, so it may not be useful to you.