PieFed now allows reading deleted posts, if you have the URL. Example
Though its more for Q&As where if requested the Q would be deleted by the person who offered it while the As would remain visible by those who offered them.
I also am absolutely in love with how it doesn't show just a blank page if you try to access the URL, and instead says the very helpful and informative:
The author of this post has been banned/deleted so they might not see your reply.
Damn I love PieFed!