That must be really frustrating!
A shop that no longer sells Aeotec sounds unusual, most of the major zwave product retailers count Aeotec among their top brands. Do you mind telling us who the retailer was?
Meanwhile, here’s some information on outdoor sensors:
I am looking for outdoor motion sensors to monitor my yard.
I bought a pair of the Aeon Labs Aeotec Z-Wave Multi-Sensor and am quite unhappy with them. Even on the lowest sensitivity setting it randomly sends alerts, some perhaps due to clouds changing the lighting (even though PIR is not supposed to be susceptible to this) and others I can’t explain at all. With several false alerts a day this thing is just useless. The Smartthings Motion sensor works great, I have some in my house, but it is indoor rated only. The Schlage / Nexia motion sensor is also indoor use only.
I am hoping someone has come across an outdoor rated motion sensor they have been able to pair with the Smartthings hub.