Leon Mege makes this ring, and if you do a search on google, Victor Canera makes a similar design called Sophia. I am partial to the LM one, but some people much prefer the look of Sophia. French cuts are very hard to source, VC recuts princess cuts, and LM has a source for cutting the frenchies. The setting will run about $8k.
You *could* achieve a similar look through graduated princess cuts, but there is not way to get tapered cuts without custom cutting. Custom cutting is expensive, plus y ou are paying for the stone and any stone lose through the recut, so «i would recommend just going with a graduation of princess cut stones. It will not be the same, but it will have a similar visual effect.
Joseph Schubach Jewelers