link to download CS4

HI all, I have searched and sorry for not being a pro at this...

I have worked successfully from my CS2 for years (and years) . . . . not wanting to upgrade, because I am a dinosaur. 

We have done the adobe download online with support when we have to change computers or do maintenance all the way up to 18 months ago (still using my CS2). 

I have others (as others on my team want to work on the newer versions ex CS4).

But know the links no longer work and Adobe will not help me get this sorted out and recommended I reach out to the "community".

Can someone help me with the link for download of CS4 . I have the serial #

Help??

shannon