try a paint supply store ,3m makes a plastic repair glue ,we use this stuff on bumpers and on cars and trucks. . v out the area with a grinder very little. . they have a plastic cleaner to get the oil out of the plastic area you are repairing and put a lite coat on and before it kicks put a nice coat and let it dry ... for 6 hours ,,should work ,,, or call you local junk yard and pick one up may be cheaper than repairing it