I've been remodeling my shop/barn for a couple of years, and so my L4240 has been sitting out in the weather. I kept the seated tipped forward for quite some time, and the little steel tabs it pivots on are showing severe rust, one of them is rusted completely in two. Does anyone know if this is repairable, and if so, where would one get these parts? The seat is perfectly fine, it's just the pivot/hinge parts I need.