You can still get s9's from bitmain. They're just reluctant to advertise it.
They've had S9j models listed on their sales page every time I've looked for the last couple months - though sometimes out of stock.
I don't seem them going out of business anytime soon, though they had to retrench a TON when their $Billions of 7/10nm generation TSMC "risk dies" FAILED and they had no new miners to sell for many months, which seems to have been what led to their dump of most of their their BCH and BTC and other altcoins "stash" to fund operations through that rough period.
They seem to be back to operationally profitable at this point, selling lots of S15 S17 and new altcoin machines.