Contact lawrence from Aquaria-sa. Im pretty sure most other LFS sell them aswell. I bought from aquaria-sa as he can supply you with the dual blue/actinic tubes. Makes a nice difference to colour if you use one normal white and blue tube and 1 double blue.
As for the skimmer, I promise it comes out... lol. If you can, remove the skimmer cup (which you more than likely wont be able to as as they get older the o-ring swells and jams them in...) it will make things easier. You hood/lid must be open as high as u can get it. You basically have to lift it and turn it a bit... with regards to the skimmer cup, an easy fix for the swollen o-ring is to just remove it. Once u have the skimmer out, get the cup out and just pull that o-ring out the groove and leave it out. On my skimmer it had no ill effects on its performace, just now allows you remove the cup easily.