So, on my day off tomorrow, I may be going to some rock climbing shops and Mil Surps to see about some webbing and sliders, snap buckles, etc. I think I can make what I need for $5-10. I good, I'll post pics.
I've made my fair share of slings on the cheap with materials available at my local Ace Hardware as have many others. That might be a decent place to start looking for materials.