Russ, if you specify on your order in the "special instructions" to please send flat top flints as they work best in your locks,,, TOW I have found will do their best to do just that. At the very least you most likely will not get a pointy pyramid humpback, but a flatter top along with some down right flat tops.
I've always had good luck with TOW.
Do you use a Mizzy Wheel, I think it's called to flatten your humpback flints?