Neolithics Flintknapping Supply and Stonewall Creek Outfitters are also worth a look/comparison shopping.
Maven, when looking at those websites you provided, a little something came to mind.
I prefer the "flat-top" flints and have always made mine using a "Mittzie Wheel" on a dremel tool.
On the web sites you provided the flat-tops are actually pictured.
Not that long ago, Ohio Joe informed me you can easily get flat-tops when ordering from TOTW by simply noting your preference.....something I had never realized before.
Also, a few months back I came across a bag of flints in my shop that I had long forgotten about.
I found 43 new flints that came about because TMA once made a "group buy" and, if memory serves me right, I bought five dozen....it was such a great deal I thought I better get all I might need for a while, of course that's the very same reason Wal-Mart sends people out to greet me when they see me coming, they know I'm an easy mark.
However, all the flints were peaked, not flat-top, so I suspect I will have to continue using my dremel and Mitizie Wheel until those are gone.
Thanks for sharing that information.
Uncle Russ...