I just saw that Monoprice is now offering a zwave plus recessed door sensor that looks eerily similar to the aeon labs one, but with a better price of $29.99.
I purchased one out of curiosity and will post some comparison pics to aeon labs device. As well as let you know how pairing goes.
If it turns out to work well I’ll probably pick a few more up during the next Monoprice sale.
And here it is next to aeon device
Full view of accessories / content. Picture from Monoprice website