I bought a c20 plow to use with my farmall 230. I got it for 50 bucks so i couldnt pass it up. I have a couple questions about it.. it has what looks to be cast points, shins and landslides that are worn pretty bad are these parts still available and if not are the bottoms on this plow interchangable with the bottoms off a international trailer plow? when new did the c20 come with different size bottoms? i ask becouse i believe mine has 14 inch bottoms and the trailer plow i have has 16 inch bottoms and if it was possible to switch them i dont want the bottoms to be too big so the plow doesnt work correctly.