Try this one

http://download.microsoft.com/download/6/0/f/60fc5854-3cb8-4892-b6db-bd4f42510f28/dotnetfx35.exe

If it does not work, check the below links too (I've never done that so cannot say you a perfect solution)

http://www.techdreams.org/microsoft/download-offline-installers-of-net-framework-35-35-sp1-30-20-from-microsoft-servers/1845-20090314

http://obieosobalu.wordpress.com/2010/09/06/download-offline-installers-microsoft-net-framework-4-0-3-5-3-0-2-0-from-microsoft-servers/