Perhaps they deactivated the item so when they scan new inventory in it does not repeat the issues that occurred before and let new orders in...
That would imply a quick, hacky fix; a bit of competence; and perhaps the need to scan new units in soon

That was my attempt to be optimistic....


UPDATE: Add to cart link just went live, and I replaced my order...
UPDATE 2: They are back to listing it as back-order with the same eta as before