Next stop, found a Lubiam SC. Quite beautiful. Brown, with medium-sized cream and light tan checks, Vitale Barberis Canonico wool. No brand label, but the size tag says "Lubiam S.p.A." in the lower right corner. It's a US size 42C. Color scheme and fabric quality seem to say it's quite recent.
Oh, and if anybody's hot for it, there's a nice Southwick for The Hound glenplaid suit in a nicely strange greenish-blue at the Fillmore Goodwill, size 42. It has some light, probably dry cleanable stains on the lapel, but my flipping rack is too full for me to risk stained clothes right now.