As a Houdini replacement, the most interesting windjacket I found is from the www.wildthingsgear.com company that allows you to custom-design their Mountain Guide Jacket for a number of features including fabric. Their most interesting fabric (for this forum) is called "Tweave 518 c" from the Arc'teryx company. From the site,
Rugged 84% Nylon construction
16% Spandex provides excellent stretch and recovery
Tremendous abrasion resistance
Water Repellency, Spray Rating (AATCC 22) – Initial rating: 100; after 20 launderings: 80
Air Permeability (CFM via ASTM D 737-96): 40
"518C is a four-way stretch woven fabric containing 84% Nylon and 16% Spandex. It weighs only 4.0 oz/yd, and because it is both thin and durable, 518C yields an extremely lightweight, packable garment. 518C makes for a lightweight soft shell jacket, perfect for warmer climates. It can also be used as a breathable side panel in a jacket made with 520E or one of our insulated soft shell offerings."
Digging a bit into the spandex, the manufacturer ( www.gehring-tricot.com/tweave/ ) writes that for their Durastretch fabrics (such as the 518c), the spandex is enrobed by the nylon.
Also of note, only wildthingsgear makes reference to 518c. It cannot be found anywhere on the web. However, I suspect that it is nearly identical, if not identical, to Tweave 536n as both are described as a lighter version of the 520e fabric, and both are described as having 84% nylon and 16% spandex.
I sent the company an email to ask about the weight of the jacket.