ksh88: How to make Tab work like Esc\

In ksh88 when you do
set -o vi
set -o viraw
we can get file completion help by pressing Esc and Back slash (\). Say we are in opt dir. Ther are 2 dirs bin and gin under opt.
If we type cd b and then press Esc \ the shell will complete the name by making it cd bin

In ksh93 the same thing can be achieved by TAB. But is there anyway we can make TAB work like Esc \ because tab is easier to press

The short answer is no.