You might be interested in the Kindle Basic. It's the smallest in the lineup and a comparable size to the first-gen oasis (before they increased the screen size) – my previous daily carry.

It's almost a pocketbook form-factor. I overlooked it initially because who wants a basic model? but the only thing I miss in practice is waterproofing. That, and the Oasis OEM cover which was unexpectedly nice, like a leather-bound pocketbook.