Are there any cars where you have to use gold, but unlock then unlock more R$ upgrades?

I am thinking of things like the cobra, the MB SLS AMG or bentry continental supersports?  all of them in the driveline you run into gold upgrades at early with a long way to go.  I need to upgrade 2 of them for series completion (cobra and one of the other 2) but if its just gold to do it, there is no point.