Do I understand you correctly? You want to fit adjustable brake and clutch levers to a 2015 scout, yes?
I have done this without any need to change cables or reservoirs or any other ancillaries! I think there are more choices of lever in the US however I used a pair of LSL levers;
Forgot to mention that I took them off after a while and returned to the original levers - didn't really like the look and they weren't particularly useful in changing the operation of the bike. I've since sold them on.
yeah that is the plan. been looking for adj levers that would fit the stock perches with no luck so I was going to look into swapping everything out. had been looking at getting parts off of a ninja or the like and swapping the complete setup res cable etc