I've never had a "fat bike" . . . so here goes. Trying to use original (mostly battered and bruised)H-D parts, but man it's so easy just to let-your-fingers-do-the-walkin' and buy aftermarket parts off the internet. If you want original H-D, you just have to sit back - and wait.
I like the handlebars - Sportster Buckhorns (2 piece) with a special, press-in and weld spacer in the center. I can now run the '49 style risers. Rims are original Kelsey-Hays.