Finished my set up today.
Installed 2 48" L track. Had to drill some countersink to line up with Rivian holes. Really a simple install
https://www.amazon.com/gp/aw/d/B0BQWRKLWZ?psc=1&ref=ppx_pop_mob_b_asin_title
Got 2 MotoHq L Track Wheel chocks:
https://motoprohq.com/products/l-track-ez-chock...