TLDR: I sprang for the JDM Gita rails. Finding an importer was the biggest issue.
Long version - I tried the Yakima racks for a while but they were chewing up my door seals.
After a bunch of un-productive calls with various Lexus dealers, I ran across a guy here who got me the rails from Japan. They are color matched to the car (factory blue).
They've seen lots of surfboards, mountain bikes, moving a few beds, etc.
They bolt into the stock mounts.
The bolts come with some kind of silicone sealant, so far no water has come in.
I'm very happy with them - well worth the expense.