Still new Corksport Front Strut Tower Bar, compatible with 2014-2018 Mazda 3, 2014-2017 Mazda 6
Price includes shipping, can discount extra for local
and set to email notify, so should be available while listing up.

more details from Corksport:

(I'd normally say people are mad to add more understeer to a FF vehicle, but in combination with stiffer rear sway bar should be good)