Slabbandit,
We had been setting 40 beds a year but we have scaled back to 20 a year now. We're all getting older and our kids are getting older and more active in school stuff so its hard for everybody to get together to put stuff out. As far as test cylinders, we would go to the concrete plants and engineering firms around here. The engineering firms were the ones who were doing the test on the concrete for contractors and they always had more than they would have to test. Also try your highway department or concrete block manufactorers, any body that works with concrete on a large scale. I've also went up to peoples house where I would see them in their yard. They where using them for edging for their driveway and flower beds and I asked them if they wanted to get rid of them. They said they did but didn't know what to do with them. I told them no problem, I will take care of it. So, always keep your eyes open.