Big T Tennis sells the Pro's Pro starting clamp same as the Eagnas starting clamp. I think if spend more than $59 shipping is free. He ships pretty fast, I usually get my orders in two days. If you were to order from Eagnas you would have to pay shipping so it comes out to the same.
I use my Pro's Pro/Eagnas clamp more than I use my Babolat clamp. It's got a tightest grip than any other clamp I own. Because the clamp is designed to open when squeezed, I'm less likely to hit my self when pulling knots. Though you are not supposed to be gripping the clamp while pulling (you naturally want to sqeeze), I do by habit and speed.
Machines: Gamma 6004 2-point w/ Wise 2086 & Babolat Sensor Dual