It's not always straightforward. I think the One Pro handlebar comes with parts that allow for it to swap into a bike with the Deda and FSA setups, but those use a thicker 8mm bearings vs. the 7mm top bearing the Token uses. I don't know if a Token Compatible C Ring or headset cover is included; they are a distant 3rd place in terms of use on bikes and were scarce outside of the Enve setups until this year.
You should be able to source the upper bearing assembly from FSA and swap it in, and then use the XMCS, Speeder, or Vision integrated bar. Neither of these are -17, but the FSA no 55. LS headset is relatively low stack. Deda also makes a conversion C ring that should allow you to run any of their bars or headsets without swapping your upper bearing. The part number is HDCOMPRDCR-ME.
Source: I run a small side business that includes headset covers to allow people to swap between integrated systems as one of the products. Honestly, not sure it would be attractive from a cost standpoint, but feel free to DM me if you want more details. It will probably take a few weeks, but I should have a design ready soon since I am filling a couple of requests for Haro Rivette conversions.
