Well the description for these sounds good, except for the reference to road shoes, and they're on sale. Maybe call TE and ask if they will also work for mountain bike shoes.
http://www.teamestrogen.com/prodPI_14181101.html
There are a couple of other possibilities on this page, such as the ones from Vaude and Bellweather.
http://www.teamestrogen.com/product/...1-c39-c43.html
- Gray 2010 carbon WSD road bike, Rivet Independence saddle
- Red hardtail 26" aluminum mountain bike, Bontrager Evoke WSD saddle
- Royal blue 2018 aluminum gravel bike, Rivet Pearl saddle
Gone but not forgotten:
- Silver 2003 aluminum road bike
- Two awesome worn out Juliana saddles