Need source for plotter paper with recycled content. The biggest cause
of paper waste in my office are the 24"x36" (and larger) plots that we
use for design work. I've checked with our usual suppliers and even
wrote www.treecycle.com, but can't find anything.

It would need to work in our HP 1050C plotter.

I need rolls of paper that are 36"x150'. 

On AskMetafilter, someone suggested I write LivingTreePaper, which I
did, but they didn't respond.