Creative solution for drooping underbody shield?

The main engine shield is drooping in front of the oil pain.

• AFAIK, there aren't supposed to be any clips holding it up
• My guess: as long as the oil change flap was still there, it probably provided some stiffness.... but is long gone.

This is the lowest underbody point on my car, giving it quite poor clearance.

Has anyone implemented a good workable solution?

My initial thought: install a stiff plastic (plexiglas?) bar above the shield, zip tied to the sheild in several places, thus holding it up.

There's GOT to be a better solution than that... I hope!
pete

 

(oops)