As for the pimple on the green, I've seen a few, but they were marginally pinable. The poofs are plentiful on Maxwell greens, and tributes to Maxwell, done by folks like Axeland and Proctor. The 6th at Crystal downs has two rolls, not pimples that might qualify for that concept, yet I think there are probably plenty of interesting pin placements in their proximity.
The concept of a Biarritz swale green oriented in the direct line of play into the green sounds more like a double plateau concept to me. Of course, if you are strictly speaking of a par 3, then I can't think of one. The second hole at Blue Mound CC is a double plateau green, yet one sees the swale somewhat in line with the LOP. George, how about the double plateau green at Waunautonomy? Isn't that a double plateau with the swale in the LOP which would be closer to a Biarritz green site if spun 90*?
If you made a par 3 Biarritz and turned it 90*, would you keep the bunkers that usually are found on either side of the swale. Anotherwords, would you have one dead center from the swale bunker in front of the green, and one behind the swale on the LOP? (assuming you can figure out the drainage challenge) How long would the hole have to play to be an effective and interesting golf challenge?