PC parts
Most electronic components are pretty easy to find, but some special PC parts, electronic components and computer things can be hard to find. Here is a list on some pc-parts suppliers. First the very big ones:
These two are huge and they have almost everything you can imagine
Farnell
Canford
El_Supply is a little smaller but still huge:
El-Supply Components
Elfa
These are in the department for specialities:
Musikding
Pyndt Shop