Decent Exposures might fit the bill for you, all-cotton or other options, lots of sizes, and custom sizing available, as well. Pull-over, or front-opening.

I got two bras from them when I needed something for breast feeding my son (that is to say, to hold the leak pads, between nursing sessions!), otherwise I'd do without, if I had my choice. I still use those bras, 10 years later, as a hot-weather undershirt under a couple of jumpers. (I removed the little ring of fabric that makes the "cups".) They're comfy! Not like the bras I've been wearing lately since I've taken to working full-time in the world and feel a need for some more modesty. I'm small and I can't get normal bra straps to stay up. (I know, I need T-backs, but they're hard to find in something lightweight.)

But even with those nice folks at Decent Exposures, what is the deal with bra prices??? It's ridiculous.

And can I confess, after years (44) of wearing no or minimal bras, recently I bought a contemporary underwire+foam (nothing fancy) bra. I've yet to use it. When try it under something and I look in the mirror, I think, "who's boobs are those? they're not where they usually are, and I think someone cut off the nipples!" It's a very strange sensation. I work on a university campus and can see that smooth and round is the fashion, but I think that I agree with Guest 5:12. I suppose most of them make up for it by exposing cleavage and lots of other skin. (Plenty of opportunity to show skin in our climate.)

~ Becky in Tucson