They’ve closed down the 7.x repositories. So the only way I could install even an old application would be to compile it from source code….and since I didn’t bother to install the GCC compiler when the repository was available, that option is closed too.
More here

I have an older computer in my amateur radio “shack,” which I use for that hobby. It’s a “middleweight” computer on which I installed Ubuntu 7.10 a while back. (It doesn’t have enough RAM for Ubuntu 8.x, which was the occasion of a previous rant.)