If you’re looking for MDT 2010 Update 1 then Microsoft STILL provides download links for it:
All other links have been replaced with MDT 2012 so grab it while you can!
One thing to keep in mind here is that official Microsoft support for MDT 2010 Update 1 ends in April 2013.
EDIT – 3rd of December 2013
Looks like Microsoft have taken the links down – I have uploaded both x86 and x64 versions here: