I believe you can get one from Haspel.Living in Atlanta I can appreciate the appeal of light and unconstructed. But previous commenters are right. The cut is appalling
Years ago I owned an unlined and unconstructed seersucker blazer in solid navy. It was one of the most versatile garments I’ve ever owned. It is hard to find solid navy seersucker jackets, and even harder to find them unlined and unconstructed.
It is used for all kinds of fabrics. Cesare Attolini makes it suit shoulders this way- others do too. Old man Vincenzo invented the Neopolitan suit.Right. And it's specifically designed for ultra light fabric. If you've ever been in Napoli in July-August, you'll understand why.