I think I know who that was. And it is not someone on this list or associated with it. I mentioned the 2sk208-GR to him by email, and he told me he had previously bought 3,000 of them, before I even mailed him.
By the way, TI have just introduced a low-noise n-channel JFET, the JFE150 (0.8nV/root Hz, and 1/f corner at 10Hz) https://www.ti.com/product/JFE150 . Apparently this is just the first in a series they are planning, with n-channel monolithic duals (apparently imminent), and possible p-channel versions.
They are quite serious about the audio market, with a superb and growing portfolio of audio op-amps.
Unlike On-Semi; don't start me on that soap box....