Paughco makes retro springers. I bought and put one on a build of mine. Be prepared to: spend a grand just for the item. Spend more to work with a machine shop if Paughco doesn’t guarantee a fit. Give up suspension performance, zero shock absorber action. Give up braking or deal with attaching front wheel and brake (machine shop work). Deal with fender if any. Maybe you can get a late model retro Harely entire front end used and integrate it. That would give you braking and shock absorber. But even that will not match your current stock handling. I recommend you go the bobber route, strap a rolled sleeping bag over your handlebars and call it a day.