HS100 -
http://www.ebay.com.au/itm/232210561037
I've found that these two plugs are cheaper here using the 20% off ebay coupon than anywhere else.
The HS100 is just a simple wifi plug, which can be connected to Google Home and Alexa, however the HS110 has energy monitoring, which I find very useful.
Cheapest Voice Assistant compatible plugs I could find at their cheapest around.
Cheers
Nice find, I've always had issues with TP-link tho maybe its just me