A lot of the upper register licks in blues use the blow bending technique (not to be confused with overblowing, which is a completely separate thing on its own) and in first position. However I do know one lick that uses blow bends in second position. Terry McMillan is the person who did this lick and he used in on almost every key in the standard 12 minus F and F#. Even though he’s a country harmonica player, a huge chunk of his licks are blues-friendly as he used the blues and mixolydian scales in them
The lick goes a little something like this:
8+’ 8+ 9+ 9+ 8+’ 8+ 9+ 9+
8+ 9+ 10+ 10+"
Slide down then draw rake
Here’s a few examples of him using this lick and some variations of it:
