tough to find the springs, I had a set of saggy ones that I gave away a ways back.... You can get them re-arked if you want, but they will sag again. I'd suggest getting the springs from a doner rig and have them arked, then, ditch your shackle lift components, and go stock with coil over shocks for the little gain you need.
By using the shackles, you alter the way the springs are designed to flex, mainly on the front, and can really ruin your springs. I'm on my third set of springs and when I have the funds to replace the one's that I have, I will get rid of my extended shackles. With a real lift kit, they do look goofy and they do limit the approach angle while adding such little lift for larger tires, ... not worth it in the end.
Anyway, this will fall into a category of "save your money and do it right when you have enough to do it right."