And what Matty is also saying is that both you and your contacts needed that plugin in order to make it work (since this information did not come from Messenger itself, but from the plugin which 'injected' this information). So it wouldn't have been 'accurate' at all (only those who had the plugin would send out this information for you to see).
And if that is true*, then no plugin/script/etc would be able to do it unless both you and your contact, on who you want to check upon, install it.
* Which I have little doubt it it isn't because a) Matty said so 
and b) AFAIK such info was (and still is) indeed not send from Messenger.
/ 
