I have a 6s, and the lower left grill piece is missing, any ideas about replacement parts, or a whole grill replacement, like a billet piece ie(esclade) and aftermarket parts for grills that look nice

 

there is a brushed aluminum kit that sells on eBay that I have, I like it. You could also consider using the area to put some lower fog lights. Or just leave the piece off and take the other side off as well

 

See what I did with my 6. I replaced the stock grills with a mesh chromed grill. It is cheap and looks very net. It is very easy to install as stock grill are clip on style giving you brackets to well fix the mesh grills.

Visit my page site at http://2004mazda6gfx.monchar.com/

 

Please also refer to the following site:

http://mrgrille.com/MrGrille-Mazda-6-Page.html

 

i like how yours looks, I have the grille inserts referred to in your second post