I've used section panels and why most don't agree I think the overseas sheetmetal is just fine for a cruiser, but not for show and tell.
I learned though that sometimes it's easier to cut the panel to fit just the area that needs replacing rather then cutting out perfectly good original sheetmetal just to fit in the new panel May sound like a waste of metal, but it works for me.Zipper has the best idea of making your own pieces, but I'm not that good at that.