Hi. You show two flatteners in the accessory list for the ZS61II What Are the model numbers? Are they in stock?

There are 2 flatters for the ZenithStar 61:

P-FLAT61A - This is a regular flattener
P-FLAT61R - This is a flattener with x0.8 reduction added in

These are usually in stock, if they aren't they will generally be replaced within 1-2 weeks.
As of Nov 12th, 2021, the P-FLAT61R is in stock.

Does this come with a soft case? The William Optics website indicates that it comes with one. https://williamoptics.com/zenithstar-61-ii Thanks.

Yes, all William Optics RedCat, ZenithStar and Gran Turismo scopes come with a good quality soft case with fitted foam