That's a tough one!
A "Real" cruise control would be something installed by the manufacturer during the bike build on the assembly line?
Can't imagine the parts cost and the labor on that.
I think there were a few threads here on something very close to an OEM cruise, do a search on that.
I have never had a "Real" cruise control on a motorcycle, my last two bikes had a friction screw in the handgrip assembly and it worked fine for me.
When I picked up my F6B, I felt the need for some throttle relief, I picked up the Kaoko, it was the closest thing to what I previously used, and, for me, it works perfectly.
In my case, it was how can I get something as close to what I was accustomed to.
Let us know what route you end up taking on the "real cruise control."