Great follow up. Thank you.
Unfortunately, they seem to be discontinued and sold out everywhere I've looked, especially various sellers on gearbest and aliexpress. The last place I could find that had them was walmart.com, and that switched to sold out recently.
I was hoping this wasn't the case as I was looking this afternoon...but I guess it's a dead end after all. Thanks.
Oh well, I got mine from Walmart by mail order but this was
about 6 months ago. Too bad if these things are gone.
I should say I found one place selling them for $55 each on aliexpress. I paid $40 shipped, for 4 of them.