Ran into the same issue of not finding a wiper blade replacement set from our local Costco/Sam's Club & auto parts store. After I came across this thread I took PTguy advice and got a set of wiper inserts from the dealership, $8/each. Super easy to change out, I made a quick video for future reference. Hope there aren't any other "nuissances" on an otherwise great vehicle.

https://www.youtube.com/watch?v=f6E5vRdqu0M - I'll admit I've never changed the rubber wiper insert before, I may just do that for all our vehicles from now on