make chrome front tubular bumper using tow-eye bolts?

As much as you may wish to protect the beautiful and expensive bumper cover, I couldn’t recommend any attachments at the holes made for the towing eyelets.

Toyota doesn’t publish the information that would be needed to evaluate how such a modification would change the car’s collision performance, and they warn against it in the Owner’s Manual (PDF): see the fourth and fifth points under “Modification and disposal of SRS airbag system components,” page 43.

Applying the loads from a relatively minor impact directly to the bumper or other structures, rather than allowing them to be absorbed in the bumper cover, could well result in chassis damage that would be more costly to repair than replacing the bumper cover. In some circumstances, the supplemental restraint system might also detect the collision as more severe than it actually is and deploy the airbags and seat belt pretensioners, destroying the interior of the car.