Dia the opensource diagramming programming program. Has a lot of shapes. However I always seem to use ones that aren't in the standard or diashapes repository.

So I've created a 2 new shapes for myself using the howto here

This is a good site for more technical information about 19" racks http://www.server-racks.com/

4cabling.com.au sells racks and fibre patch leads

Optical Fibre Patch Panel Dia Shape