I am pretty sure they do. On the other side when you are about to leave traders village, there is a car accessory and they also do detailing. So I am pretty sure they have the truck liners you are looking for.
I'm not sure about the headliners, but they do have a lot of truck accessories. It's worth checking, because they always have good deals there...
Yes for some
They do have a lot of truck exert users, recommend check towards the back of Traders
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