[JeffF.]

Mithadan, you wrote earlier, "In The Council of Elrond it is stated only that the Three were hid by Celebrimbor. So from LoTR it is clear that Sauron gave at least the Nine to Men, but how the Dwarves got the Seven is not clear."

In the Silmarillion, Of The Rings OF Power in the Third Age (p357 of the Ballantine paerpack) it states that after the Three were saved and hidden, "...Sauron gathered into his hands all the remaining Rings of Power; and he dealt them out to the other peoples of Middle Earth, hoping thus to bring under his sway all those that desired secret power beyond the measure of their kind. Seven rings he gave to the Dwarves; but to Men he gave nine,..."

RotK App.A as already mentioned stated that Durin's Folk said their ring was given to them directly by the elven smiths and not by Sauron.

I've found no other statement regarding the distribution of Rings to the Dwarves but those two make it pretty clear that Sauron gave at least six and maybe all seven of the rings given to Dwarves.