Hi, I think there's too much talking on something that is simpler than it seems, though as with many things it may requiere to work on it. Please, I'm not saying that I have the sorcerer's stone, it's just a matter of concentration. Anybody who played a little piano and practiced scales with triplet figuring, knows what it feels like when the accent falls on different fingers... and on different notes because most scales have 8 notes, not 6 or 9. You just don't change the scale fingering so that the accent will always fall on the thumb or the middle finger.
Here's just a couple of exercises I posted, which could also serve as a source for anybody to develop new ones... and they're not based on triplets. What I personally and usually do is practice with a metronome at a very comfortable speed, and place the accents on the "ands" not on 1, 2, 3, 4. Also play straight and swing eighths... and you'll see and feel the changes.
Hope this helps.
Three fingers excercise 3 Fingers Exercise II