When will Ultra add-on camera be available? Looks like they're sold out?

[MFIHS]

I've tried purchasing multiple different options but they are all sold out. When will the Ultra cameras be available? I purchased by Ultra Kit with base station and 2 cameras but they don't sell single cameras by themselves.

[dcfox1]

The Ultra stand alone seems out of stock on Arlo's site but the stand alone is in stock on Amazon and may be on other sites.