I ordered the black SS brake hose (for the ABS model) from a fellow Stromtrooper member who had them made up. Here is a link to a post in some of the other discussions: https://www.stromtrooper.com/245899-post26.html
I didn't need a part number for the brake line; he knows.
He sent them immediately. I had a friend install it along with the risers, lowering links, handguards, etc. The brake line was as he described, a perfect match. I meant to post a comment before now. Even though it's stainless steel, it looks like the stock brake line with exactly the correct fittings, just like he said. I used a set of Rox risers (which are infinitely adjustable about 2" any direction) I had from the old bike, but any up-and-back risers would have worked for me. Link: Handlebar Risers for Dual Sport Motorcycles
The handlebars are in a perfectly neutral position for me now.
I also added Van Desel's highway pegs and a back support. All these ergonomic changes worked perfectly for me; I have a neutral seating position with no fatigue after riding for hours. I can't sit still in a chair or car that long, but on the Strom I can alternate between the highway pegs and the standard pegs, have back support, neck, wrists, and elbows neutral. The ride is therapeudic rather than getting tired, sore or cramped. Last weekend I rode 3 hrs. from L.A./Valley to the Kern River and when I got there I couldn't believe I was ready to keep riding. I just wish I could ride everyday like I used to.