I got mine done at Clear Auto Bra in Creve Coeur, $275 for 20% all around. They did a good job but there are cheaper options, I was getting Xpel as well so I figured I'd just have them do both at the same time.
Are you a member of the STL ST/RS group on Facebook? There's a fellow owner in the group that does great work and he's pretty cheap IIRC.