Jim,
You got me curious so I checked too...and I can no longer find the windproof pull over on their site, either. I believe it used to be at the bottom of the wool pullovers.
Whip had one I saw him wear.
One thing about most windproof garments...they're often made with nylon and are noisy when cold. but under a heavy wool top, not as big an issue. Some are made softer, but more bulk.
Second thing I noticed, is they are very WARM if you're moving.
Cabella's had FLEECE style windproof garment, but it is bulky and the wool pull over is hard enough to get off...with a fleece garment under... being the wool is unlined, it can be like a snake shedding skin!
Choose wisely. I have 2 nylon ones a local construction outfit gave away as promos. they work. The golf attire might be the ticket!