I'm struck by the level of entitlement in this thread.
Yes, it'd be nice if he replied he's not available. But the indignation when he does not is overboard. Perhaps he doesn't know when what he's currently doing will wrap up. Perhaps he's to busy doing it to reply. Perhaps he simply has a work life balance and you're not entitled to his personal time. The OP says he contacted ten providers. So at best, there's a 10% chance anything will come of the message each one received. And yet we wonder why the provider doesn't drop everything to reply to each one.
Kevin Slater