Ask tower?
I needed info re an en-route airfield in Malaysia, so I just called tower and asked, making it clear that this was info only, not intending to divert. The tower op was an Aussie so we had a nice informative chat.
I assume you have local F/O. If you have one who really understands what you want to know, perhaps he could call and get your info. On the other hand that could turn out to be politically difficult.