All VGTs since the AMG gift currently need to be purchased, as their respective Super Lap events have expired. WSR F3 can be won by accomplishing a Gold time in the second Ayrton Senna Tribute event, or alternatively, can be purchased from the Ayrton Senna section in the dealership.
If you're looking to use the Nissan 2020 for the 550pp 4wd seasonal because everyone sees to be doing so, I recommend using a detuned (from 571pp instead of the Nissan 2020's 615 or so) Tommykaira ZZII '00. It was an easy dead stock detuned SS gold for an event that I didn't particularly care to invest too much time in.