@leocg In his case, I see a post (about installing extensions in Opera 95) that was approved, then the topic was deleted. While we can see that post, the fact it was about such an old version of Opera is presumably why it was deleted. So the answer is ... if he wants his text for personal use I'm sure we could send it to him, but if his intent is to repost it he shouldn't bother as it would obviously be deleted again.
Posts that are queued and rejected are gone - we can't recover them. Posts that are made then deleted are a different matter.