Just to give everyone an update:

Indicators started to sound at around 29K and one of the inner pads was almost all gone at 30K.

Dealers quote ~$295: ~$160 + labor and their service consultants believe that it's perfectly normal to replace the pads at 30K

Bendix Australia is yet to have rear pads for the 8th gen Accord. Bendix U.S. part number is D1336.

Honda U.S. part number is 43022-TA0-A00 (same pads as the Acura TSX or Euro) and I can confirm that it perfectly fits the Australian models.

The DIY didn't take more than 45 minutes