Man, there are some things that just can't really be manager in the field.
Something to pad (jacket, tarp, Etc), something to stiffen (knife to cut sticks, split, trekking poles, Etc), and something to fasten (tape, string, webbing, Etc). Mainly because with stability comes comfort.
In theory, with that injury you can still put weight on the leg if you have it stabilized so the knee doesn't collapse. I'm going to guess that would be miserable and if you had to walk out (you made the better call getting help), fabricating two crutches would likely be the most important.
10 feet of ducktape wrapped on a trekking pole would likely be more useful than Paracord.