I want to replace my WEMOs with in-wall outlets anyway. Guess I now have an extra incentive for that move.
I already have ZLINK. ZL-PD-100 Z-Wave Plus Plug-In Dimmer https://smile.amazon.com/gp/product/B07DFRF4FM/ref=ppx_yo_dt_b_asin_title_o08__o00_s00?ie=UTF8&psc=1
and Zooz Z-Wave Plus Power Switch ZEN15 https://smile.amazon.com/gp/product/B07578W7KY/ref=ppx_yo_dt_b_asin_title_o06__o00_s00?ie=UTF8&psc=1
which, I believe, will work as repeaters.