Seems to be the fault of the dependency package. None of the textures show up in those lots either.
On the LEX page, it says that the zip should contain two .dat files+folders, but actually the zip only has the folders with the lots, but no dat files. And by the looks of it, there are two dependencies for it at the bottom. I'll install those two packs, but not sure what the deal is with the two missing .dat files.
Sometimes wish modding things wasn't so unnecessarily convoluted.
EDIT: thanks for the tips. It was the dependencies for the dependency.