i did a quick remix and added a second hook, as i found the where the original hook was, the fuel cap could still impact the body of the car. that issue is now fixed. i have built in supports between the two hooks, so support is only required from the build plate.
i would also print on edge as the original STL file is, and add a smallish BRIM i used 4mm and it prints fine. the design also fits the 2018 rapid as tested. cant say for sure if it works with other models.
i might have to re print in PETG depending on how heat resistant the PLA is to the Australian summer.
supports from bulid plate only. your printer should be able to handle the bridge in the middle fine with no supports needed.