Where can i get the newer ones? I cant find the serial number inside the metal case but have this game about 4 times for some reason
I don't think, that it's still possible to download the patches. Patching was done via the program Stardock Central originally, which was later replaced by Impulse (and is now owned by Gamestop).
If you have registered your serial number, you can download a fully updated installer from the My Downloads page at the Stardock Store (unless they have changed that for new registrations).
I have the Limited Edition too, and the serial number is at the back of the manual. However, there is a possibility, that it won't work, because Stardock changed their serial numbers a while back. In that case, it's probably best to write a mail to support@stardock.com
As a last option, you could buy the Ultimate Edition. It's fully updated and includes both expansions. The only possible downside (besides having to buy the game again) is, that you'll need Steam to install the game.