Actually there is: http://nishi.dreamhosters.com/u/BWT16.rar
Code:
// some japanese books: http://nishi.dreamhosters.com/u/test_bwt16.7z
6,171,521 testu8.txt
6,171,525 testu8.bwt
975,482 testu8.bwt.paq8px178
4,298,866 testu16be.txt
4,298,870 testu16be.bwt
963,802 testu16be.bwt.paq8px178
4,298,864 testu16le.txt
4,298,868 testu16le.bwt
954,412 testu16le.bwt.paq8px178
// enwik8
100,000,000 enwik8
100,000,004 enwik8.bwt
21,614,894 enwik8.ari
199,243,770 enwik8u16
199,243,774 enwik8u16.bwt
100,000,111 enwik8u16.bwt_u8
21,718,209 enwik8u16.bwt_u8.ari