I saw someone looking for the complete Mootools 1.11 file. It’s unfortunate that the person can’t upgrade to Mootools 1.2.1 in his project since his particular script has not been ported yet.
If you need Mootools 1.11, let me direct you to Google! You can get the compressed-complete-cdn-googlified Mootools 1.11 file here. If you want the uncompressed code, they have that too. Google hosts a number of other JS libraries which can also find here.
I highly recommend using Google’s hosted version of 1.11 or 1.2.1 because it saves you from having to host it, clearly, but also it is on the Google CDN and optimized for proper caching.