Last year, this big omnibus was published in Japan: Tiger Tateishi Super Multi Dimension, probably prompted by his death in 1998 (and the fact that 2010 was the year of the tiger?).
It’s a great book, spanning his work in comics. It’s also a big book, difficult to scan, but I’ll try and post images from other works than the little metaphysical monks, like his 2-bit, pixel-comics and his Fujio Akatsuka-inspired stuff.
He was also a painter, and you can find auctions online, but I’ve never seen his oil paintings in person. I’m really glad people seem to like this, as he’s one of the most fascinating artists I know.