So I didn't buy the forearm crutches but I did get some high tech Ergobaum Dual crutches and for now it has fixed me. Shoulders feel radically better after two days. Not that expensive, about $200 on Amazon.
https://cdn.shopify.com/s/files/1/07...g?v=1503329409
They fit up under the armpit like regular crutches, with the handle in front. Really changes the whole geometry of arm, crutch, body and for now it's working great. They're made of heavy-grade anodized aluminum, they're like wht the SWAT team would use if they needed crutches. Just thought I'd put this here for anyone researching crutches later.