Those are great photos you took, thanks for the effort to show us what you are dealing with. Your bar ends do indeed look very rusted, but they don't appear any different than any of the ones I've seen other than the rust. I don't think those are broken, at least not on the ends you are showing. On all three of my vans, the ends are exactly like your photos except no rust...the clips are separate just as yours are and the bars are hollow.
Can you post a photo of the replacement bar and tell my where you obtained it? I'm interested to take a look at a solid bar myself as I have one van that seems to 'hop' a bit on bumps and I'm thinking its a weak bar.
I've replaced the struts, springs, bearing plates, etc on lots of the vans and never changed out the sb on one.
Thanks,
John