Ed, you might want to go to the website http://www.Campmor.com They have a plethora of camping gear, seasonal clothing, bicycling gear/clothing, etc. My balaclavas (3) came from Campmor many years ago and they still work great. They have a number of styles from which to choose. Good luck.
You say a really warm balaclava for lower 30’s. Just my opinion, but:
1. Probably a thin one would suffice for lower 30’s.
2. A really warm one usually equals thick, and may not fit very well under a helmet.
30s I use a skull cap I got at a trial that’s made of receycled plastic bottles and something like lycra maybe and 180s ear muffs. Get down in 0-10’s then I have a baclava and “the Masque ” that I had to modify a bit to open up the mouth more. 0s add ski goggles. Minus temps its the “American Clascics” probably fake rabbit fur ear flaps with the insulated top & back. With that I use a old helmet that has all the pads taken out to fit over it.
Skunky…yep, I use something close to what you do when it’s in the 30’s (as in the BRR ride.) I use my thinner Merino wool balaclava and use thinner pads in my old Giro helmet. When it’s much colder on BRR I use the Merino plus the thicker Polartec balaclava (it has just a small slit to see through) and take out all the pads of my old Giro and it fit just fine over both “clavas.” The year that it was something like -35 degrees I added ski goggles over the sunglasses and had about 1/4 inches of ice on my sunglasses when I got to Rippey. Was getting worried on the way to Rippey because things were getting “wavy” but still felt fine and discovered the icy sunglasses when I got to the Methodist Church for the baked potato lunch. BRRR!!!
I got a “BUFF” brand for christma. I love it. It is extra long and the bottom six inches are soft fur with the rest thin nylon. Worked great in 33 degree this morning but was over kill. I will switch to a regular BUFF tomorrow.
I’ve used a PI microsensor balaclava for years. As it gets colder I start with a PI headband, add a skull cap( both fit under my helmet with minor adjustments) as it gets colder, if windy I have a wind cover for my helmet that works really good and in really cold weather I use the balaclava. Nice thing about it is that I can pull the cover down from my mouth if riding with the wind, so my glasses don’t fog up, and if riding into the wind with it pulled up under my nose my face is warm. Trick with ridng with my face covered I make a point of breathing with my lips up against the fabric so my breath blows out and not up into my glases. Oh, I’ve ridden in -20 wind chill with the balaclava and helmet cover and was comfortable.