I have Rodney's muffler shield. It is made of the same material as the TFS splash shields. It seems that TFS buys some things from Rodney, and Rodney buys some things from TFS.
I have radiator shields (upper) from 3 separate vendors. The pieces are not identical. They seem to be cut slightly differently, but seem to be made from the same matetial, also. The texture is different from stock. The stock matetial is slightly thicker (by feel), but thiis other rubber is soft, flexible, and slick. Not necessarily greasy, but it should be easier to clean.