I have some extra caps I've been hanging on to in case I ditch the rack. I doubt I will, make me an offer.
(I don't think I have the bolts anymore that go in the holes, I'll check, but I'm sure there is an easy inexpensive way to keep water out. Maybe some after market bolts, they are just bolt-on and give the FJ that custom look).
Edit: I can get you some pics, but to my knowledge they are flawless. They have about 200 miles on them. (mostly highway miles

)