Livery unlock query

[neil3646 24]

Just wondering if anyone had any information about how to unlock certain liveries within the game

I've fully completed all the career mode, including seasons 1-3, and completed every objective except the "5mins on 2 Wheels"

I've levelled up to level 99 3 times, so my driver level has gone from coloured, to bronze, to silver and is now level 01 gold

I've completed all the Xbox achievements except "Around the Globe"

I still have the following locked liveries however:

 

Heritage 70 and 71

Custom 04

Tuner 04

Urban 30

Prestige 14 and 15

 

Anyone know how to get these last few? I know one is for doing the 2 wheels objective, and the prestige ones are likely both for levelling up to 99 again

But what about the others?

[Assiemodis 66]

Getting gold on 100 seems to give some rewards, so 1 or 2 liveries seems likely to be part of that reward