Replicating manufacturer finishes yourself can be a challenge, particularly if the material is a coating rather than a paint. You could try options such as Plasti Dip Color Bond or ProXL ProTex Textured Aerosol, but we would suggest testing the finish on some scrap plastic first. For a good finish we would advise removing the affected part before painting, but you may find that it is easier to find a good used part online and simply replacing the affected area.