Meteorites from the lunar surface do exist, and Antarctica is a good place to find them. But they are very hard to find. Apollo returned 850 lbs. (380 kg) of material. But as of the late 1990s, geologists had found only 19 such specimens. And this is the best effort of the entire international geology community. It's difficult to believe that NASA could recover so much more material in the decade during which the hoax was allegedly executed. Consider also that Antarctica was first identified as a haven for meteorites in 1969, by Japanese scientists. That makes it hard to argue that von Braun went there in 1967 to find specimens to pass off as surface samples. It also makes it hard for NASA to have collected enough samples for Apollo 11 and 12 and prepare them in such a short period of time.
Finally, meteorites are very different in appearance from the Apollo lunar samples. Samples brought back from the moon have very small pits on the surface. These so-called "zap pits" are caused by micrometeoroid impacts and are generally only visible under a microscope. But they are completely absent from recovered lunar meteorites because the outer layers have been burned away by passage through the earth's atmosphere.
There are other surface features particular to moon rocks. The outer layer is rich in helium-3, an isotope difficult and expensive to acquire on earth. It also shows interaction with the solar wind, which contains exotic elements not found on earth. If the outer layer of the meteorite is chipped off to remove the evidence of passage through earth's atmosphere, all the rich evidence of presence on the lunar surface is lost too.
