eyeheartawk
#1 Enworld Jerk™
Those are just the Impact Miniatures dice in a different tube sleeve.Got mine from Goodman themselves.
They are the most common iteration.
There are also the Zocchi versions, which I prefer. And were the only game in town when I started. If you don't like the shapes of the Goodman/Impact ones try the Zocchi ones as they are differently shaped.
It looks like their D7 is hard to find at the moment though.