Heating Cooling Units

Need a suggestion for metal heat deflector?

I have a record of heat (heat is not central, but Heat coils are located behind the register and blown by a fan) behind furniture and melted the plastic baffles heat I purchased in the past ... Does anyone have suggestions on what I can use as a metal heat deflector? I can not seem to find not made of plastic. Thank you in advance

Try to bend like a piece of flashing used on roofs to blow up and how you need too.

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