At this moment PJRC does have some extra MIMXRT1062DVJ6B chips. Email me directly if you need a small number (under 50) to get a design started.
They're showing long lead time like so many other parts, but Digikey did have some in stock only a few weeks ago. We recently got some back in January. People at NXP have told us the IMXRT chip is made at a different foundary / fab which is much less affected by the global chip shortage. No promises, but all signs seem to suggest NXP will be much better able to deliver this part thoughout 2022.