Hello,
Just so you know, this is not a blizzlike server. We used to have one but it was removed a long time ago because of some problems with it not having backups for the realm. As for your actual problem, you can use the Reinstall button on the launcher to make it download ~20 MB file that will automatically extract into a 4.0.6 WoW (Our core is 4.0.6) which you can use to play this server. When we update to 4.3.4 in the future, it will be updated to reinstall a 4.3.4 WoW.
If you are so desperatly wanting to have a 4.2.2 or 4.3.4 WoW, you will just have to find a torrent of one, or download each individual WoW update patch on some website to update the 4.0.6 WoW up to 4.2.2 or 4.3.4.
Also, just a note. Don't try and bump topics, especially ones that haven't been posted on for 4 - 7 Months.