The newest (at least newer) version seems to be http://speleotrove.com/decimal/
Top of page says:
Welcome to the General Decimal Arithmetic website, which is now hosted
at speleotrove.com. The page and file names here have not been changed
from the names used on the previous website, www2.hursley.ibm.com.

File to download is dectest.zip
All files are now CRLF
More significantly the versions are bumped up from 2.59 in the python
repo to 2.62 at this link
Needless to say there are much larger differences between these than
just CRLF :-)

On Thu, Jun 25, 2015 at 10:57 PM, Eric V. Smith <report@bugs.python.org> wrote:
>
> Eric V. Smith added the comment:
>
> At least for the files in decimaltestdata, I'd be wary about changing them. My understanding is that these files are from the IBM decimal test library. I don't think we should stray from upstream here, even for something as simple as line endings.
>
> Unfortunately, the link http://www2.hursley.ibm.com/decimal from the file headers is no longer valid.

The newest (at least newer) version seems to be http://speleotrove.com/decimal/
Top of page says:
Welcome to the General Decimal Arithmetic website, which is now hosted
at speleotrove.com. The page and file names here have not been changed
from the names used on the previous website, www2.hursley.ibm.com.

File to download is dectest.zip
All files are now CRLF
More significantly the versions are bumped up from 2.59 in the python
repo to 2.62 at this link
Needless to say there are much larger differences between these
versions than just CRLF :-)