If you click on the time-stamp of an RMB post, you go to a page showing that single post by itself (for example, https://www.nationstates.net/page=rmb/postid=27280889). However, the normal "Quote" button that appears when you mouse over an RMB post in a your own region (or a region in which you can post) does not appear in these individual post pages.
This is a minor fix, but I see a use for it. When I have a number of other nations' posts I want to quote in a single post of my own, I usually click the time-stamp on each first, so that I can isolate it and not lose track of it as I compose my post. But then, I can't quote them. I have to click "Context," then "Quote," which seems like an unnecessary step.