There are a few aircraft available that had been leased to WOW, but I don't know how quickly they can be re-leased to another carrier. One or two seem to have been seized.

It'a almost surprising that WOW didn't try to consolidate routes and wet lease some aircraft to carriers that had been using the MAX, as a way to get some money fairly quickly. OTOH, if everyone was expecting WOW to collapse, leasing from WOW wouldn't be a very stable solution for another carrier.