Rock guard replacement vote needed!

My '66 Safari has the old corrugated fiberglass rock guards from Thorton Industries of Knoxville, Iowa. They are green and brittle.



So...what would you replace them with and why?



Solar guard

http://ift.tt/19EKEKy



Lexan

Lexan Vintage Front Window Guard



Or



Rox-Sol Gard fiberglass Fiberglass Stoneguard



Thanks for your input!