ADF's website says their plates would ship in 3 weeks (
https://www.adfcustoms.com/shop/fist/14skidplate)
$490 shipped.
I did hear back from Skid Plate Guy. They're expecting to ship by end of May, for $700 + shipping.
Saving $200+ and getting a skid plate earlier sounds good. I definitely don't plan on doing anything more intense than rallycross, so I don't know if I'd see a benefit from the extra toughness of the SPG option.
@asidrive, how quick is the ADF plate to remove / reinstall? I see people commenting that having a plate installed can lead to higher temps, so it'd be nice to be able to drop it for track days.