It's between the Castrol GT-Four and the Sticker Bomb.
Here is the link, for you :

https://www.dropbox.com/s/4drcb08d9yya3eo/Richards%20Brock%20A9%20X.zip?dl=0

Also, when you download the mod from the Workshop, Gollywog generously addet it in it. To correct the Workshop issue with liveries (and also rustmaps), I made a quick guide :

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1206711344

(work with every mods coming with liveries and rustmaps).
Hope it will help you out ;)

ive been in the paint shop and there is no Peter Brock Livery how do you get it