9mm moon clip conversion cylinder for K frame 38's

[serger]

I am going to have at least one of My K frames fitted with another cylinder that has been modified by TK Custom for use with 9mm Luger moon clips. But the big thing that kinda turns me off with this is the cost of the moon clips themselves.

I understand quantitative easing is a fact of life and .22LR's cost more than it costs me to load 38 Specials, 45ACP or 9mm. But over $2 dollars a clip is high.

Does anyone have a source for the clips that doesn't have them costing $7.50 a piece?