The W salt rivers haven't been found yet to my knowledge. The salt rivers are out there, just no Ws in them. I think it's setbacks due to the covid thing.
Definitely they missed the Ws for Salt River Park. they aren't there. but maybe they put them all in the 2nd release of Salt River, or they double release with Marsh-Billings...... So far, for 2020 you can only find Ws in the Weir Farm rolls. both the Samoa and Weir farm Ws are there. Then this one is MIA still....
None have shown up on eBay.....so you gotta know they aren't out yet. I look for them to be included in next quarter release just like the Samoa W's were released along with Weir Farms.