It is from Dennis Quella in Castlerock, Colorado. It is what he calls his GTS, no-holes spoiler. He offers it in fiberglass and ABS plastic, I chose the latter for its better flexibility and durability as some driveways will undoubtedly catch it from time to time.
it is basically flat, with rolled edges on its perimeter. Mounting is done by attaching to the front valance through the rolled lip.
I install mine to give 3 1/2 inches of ground clearance. I know of one vendor who finishes the installation with a bead of smoothed black silicone at the spoiler to valance joint, but that is totally unnecessary and adds many hours to the inevitable replacement as plastic hanging from the bottom of the car does not have an indefinite survival quality. I find I typically get five years or so before a replacement is needed.
I believe the cost is currently $125 plus shipping. he will supply a package of small 6-32 nuts and bolts and washers, but I find sheet metal screws to be a better approach.
I have found over the years that fitment is generally pretty good. My placement puts it just at/slightly below the grill opening in the valance. Two screws first in the center and then install three or so screws per side once you have determined the final tilt/angle for the best fitment at the edges of the valance.
Larry