I know some Force-users can deflect blaster bolts with their hands, but can they also have the bolt reflected back at their attacker barehanded? Any examples?
No. That is a special quality of the lightsaber that allows for bolts to be deflected. Bolts can be absorbed by hand but in most games this is mitigated through strain or or drain on force abilities. It is much easier to deflect. The absorption is done to make a point, you will not succeed in attacking me, or to prevent errant deflections from harming bystanders.
Yes, a Jedi or Sith can reflect blaster bolts with their hand using Force deflection
Episode V, in Cloud City, Darth Vader also use Force deflection to deflect shot from Han Solo.
There also another question about this. Why did Darth Vader choose to take shots from Han Solo?
It seems quite likely that it is not a common power, but a sufficiently powerful Force wielder could deflect a blaster bolt with their bare hand. In Star Wars Annual 1, when the Rebel Eneb Ray mounts an ill-conceived assassination attempt on Darth Sidious, the Dark Lord of the Sith deflects his blaster bolt with his hand, with the reflected bolt flying off in all directions:
As for reflecting it back at an attacker, there doesn’t seem to be any particular reason that Sidious couldn’t deflect the bolt back in a direction of his choosing, if he can deflect it. That is, after all, what Jedi and Sith do with lightsabers. A hand is a different tool, but the principle seems the same: applying an opposing force to move the bolt in the direction of one’s choosing.
And, of course, as an indirect interpretation of “reflecting a blaster bolt with one’s hands,” one could simply use the Force to stop a blaster bolt, as Kylo Ren does, and then turn it back upon the one who fired it.
There is a rare ability among the Jedi called Tutaminis. It allows the user to absorb or deflect an energy-based attack. I guess if they aimed right, they could "reflect" it back to the attacker, but I've never seen it. Master Shaak Ti used this, although she possessed only an elementary knowledge of it. Master Yoda used it in his duel with Count Dooku, and Vader used it in Episode V, when Han Solo fired some blaster bolts at him. I'm not sure about lightsabers or blaster bolts, but you can redirect lightning, as Yoda does with Dooku in Episode II. So, Jedi can "deflect" blaster bolts, but I don't know about "reflecting."
In the canonical novel Ashoka, the former-Jedi titular character is capable of doing so, but realizes that it would be too risky to do so while on the run.
She couldn't use the Force for anything as showy as deflecting blaster bolts, but she could jump and she could run, and that would have to be enough.