Debian (Jessie) install old package from archive (as Lenny or Squeeze)

I tried many searches, then I cannot find the solution, here is my problem.

My server is debian with Jessie (8) distribution, but I have to install a old package now archived which was available for old distributions like Lenny (5)

The package name is : ttf2pt1 Can be found here (Official) or here (Debian archive)

I tried to edit my sources.list with old sources urls but nothing change, I got several errors like :

Reading package lists... Done Building dependency tree
Reading state information... Done E: Unable to locate package ttf2pt1

E: The value 'lenny' is invalid for APT::Default-Release as such a release is not available in the sources E: The value 'lenny' is invalid for APT::Default-Release as such a release is not available in the sources

What is the right way to install an old package onto an actual stable distribution ? Thank you

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