Amazing to see a mirror still up! I went ahead and downloaded the offline Mac version 1.1.4, but it only had the Harmattan toolchain, and the package manager didn't have any other options. So, I tried downloading the 1.1.2 version, and it didn't have either the Harmattan or Maemo toolchains; however, the package manager did note that you could download the Maemo toolchain. So, I went ahead and clicked on it, and amazingly, it started downloading!

I don't know where it's getting the data from, but it successfully downloaded the entire toolchain. (It popped up a single error message at the end, but I just clicked "ignore", and went ahead with the installation.)

So, if you want a full Qt installation with a Maemo toolchain and all, try out an "offline" version of SDK 1.1.2! Don't wait. Who knows just how long the repository supporting this version will remain up...