There is an English version of Adobe Reader shipped by Adobe, which I guess is the one you are looking for.
You can get the same from: http://get.adobe.com/reader/otherversions/
Also, the FTP site that you tried, please try and access the en_US directory which has the English Reader that you want to install on your system.
Thank you upside down and backward person. That worked like a charm.
It does appear that selecting English and English (UK) gives you the same download file.