i know a friend that has a electric drum kit and i was wondering if its possible to get extra sounds for it on the net somewhere? i asked him if it was possible and he said yes but does anyone know where i can get them from?

Is there not like a box which contains all the different types of sounds they can make. I can't remember what they are called cause i don't own an electric kit, but you may be able to buy one separate which has different kit sounds etc. on them.
You can use the drumkit as a MIDI controller to trigger sounds on another device. Maybe you can't, I would check the manufacturer's website to be sure, but I have a Roland TDS3W and it's MIDI-capable, and I would assume MIDI is a standard feature on all electronic drumsets.