Can Sonar 8.5 or X1 use Logic Pro plugins?

First time I see a plug-in marketed as such. :s

Short answer, no. The only application which works with Pitch N Time on the PC is Pro Tools.

Maybe someone will have a suggestion. I never had to pitch-shift an entire final mix.

Maybe you misunderstand.  Actually it has been invented. There are many plugins out there, it's just the quality of some are better than others as my post mentioned.  The one built into SoundForge is pretty good but the result is not without some artifacts noticeable to a trained ear.  Very usable but not to my preferred standard. 
Take a listen to the demos at Serato at http://serato.com/pitchntime/examples .  No artifacts that I can hear even up or down 6 semitones.  The reason I need this is not to fix a 'pitchy' lead track in Sonar but take a finished 2 track backup and pitch it up or down a little for the vocalist when the backup tracks are not in a good range for the singer(s), and I don't have the original multitrack file.

Thanks for the comments.

He was replying to my assertion that such a plugin may not exist. 

What I misunderstood is that he's simply trying to pitch up an entire mix, which can be done with existing tools. Just not very well. I have heard that Waves' Soundshifter is good, and it's on sale at Waves Universe for $337.

Because this said plug in will not work with Sonar and no one here has ever had good results pitch shifting an entire mix ( ever) then your next step would be to ask the people who use logic and Pro tools if they are happy with the results. Try those forums or Gear Slutz. You will then be faced with purchasing one of those DAW's ..That's going to cost a lot of money so I hope this is critically important. If you think of the complexities of a musical wave file, the harmonics, the overtones all those wonderful things that please the ear, how can that not be destroyed by pitch shifting? It would be something if it has been perfected.