With the ARA finally bringing on Rallysafe, it is now required that all teams competing in an ARA sanctioned event that RallySafe is onboard. There are multiple options when it comes to install kits, but

Kits can be purchased directly on the RallySafe website here:

https://shop.statusas.com/shop/category/rallysafe/

Note: the permanent kit requires a 14mm hole to be drilled into the roof of your car. See the installation video.