There have been a number of questions on the MSDN forums about where one might download FXCop version 1.35. It seems that GotDotNet has got up and gone, and that's where FXCop used to live. I found that you can download the FXCop 1.36 BETA from the Microsoft Web site, but 1.35 was nowhere to be found.
One option to get FXCop 1.35 was to install the Windows SDK for Windows Server 2008 and the .NET Framework 3.5. This is an awfully big package just to get FXCop though.
Fortunately, David Kean was kind enough to upload the 1.35 version for folks to download on the new MSDN Code site, and blog about it.
You can grab it here: