Think you can find them cheaper? Awesome. Good luck. I've bought several sets, found a couple sets at pick and pull, and sold a couple sets, and still run a couple sets. The 11.75 sliders are sought after parts, that's why they're repopped now. They're cheaper now than they've ever been because of the reproductions out there. The cars that came with them rarely hit the yards anymore. The ones I bought at the yards were the only ones I ever bought for under $100. And the ones I sold got more like $130. I've got a couple sets still, but I've got a few cars too. Needless to say if I did sell originals it wouldn't be for less then repop's. But what do I know. They're not Chevy parts, that's for sure.
