I ordered one for me and one for milkman, then took delivery of them in my home town. Milkman and I got together to finish the deal yesterday. The shipping 2 of them, and ordering 2 the same size saved a bundle. Yes 46 3/8 ID worked fine for both of ours, and these things fit fine.
They are heavy. This bar is made like ones on much bigger machines, I doubt we will ever break them, or wear them out.
Cost, you will need to contact Markham Welding
http://www.markhamwelding.com/ to get a price, but if you can get 2 or more buddies with the same or at least order at the same time, you could save on shipping at least. I prefer not to price someone elses product, especially since these are priced at the time you call, unlike tractors etc.
They are great bars, great people, and just like country folk, friendly as all get out