Fixed - purchased the seat sensor and lower seat foam padding. Again, my research seemed to reveal that for vehicles with sport seats you can only purchase the seat occupancy sensor mat with the lower seat cushion.

Sourced the part (number 52-10-7-247-502 w/heated seats) for roughly $625 and installed. Everything was pretty straight forward. I used zip ties instead of hog clips to attach the leather seat material to the seat cushion. It was a bit tedious but nothing that could not be handled.

Reinstalled seat and the warnings disappeared.