The most popular way is to buy the bars with the pullback risers integrated in the bars.
Carlini makes some nice bars.
There are far too many choices, it depends on how long your arms are and where do you want to sit.
I've seen 5,7,and 9" pullbacks.
I opted against dragbars because I don't like how they look on a FB from head on...I chose risers with keeping my stock bars.
You'll need bars w or wo risers, possibly throttle cables, clutch cable, brake lines and possibly need to have the wiring extended for your handlebar control switches...probably best done by a competent shop.