Looking for template or simple model + template

I wanted to make my own modern liveries for the default cars but I couldn't find a template. I'm guessing I would've had better luck on gp4db but since it's down at the moment I don't know for sure (What a nice timing I have for trying out GP4 lol).

I guess a simple standard-looking model + template combo could work for me but that would mean making all the cars have the same shape so the option to make liveries for the default models is preferred.

Any suggestion will be appreciated as well.