The only way is to find one used.
Holosun stopped production of the V2 as part of the settlement with Trijicon. The intensity controls in the vertical configuration (on the hood instead of the base) allegedly infringes on Trijicon’s patent, so they went with the horizontal layout (on the base) as seen on the current X2.
I own an original V2 and can confirm it’s a better setup when in manual mode. In autointensity mode it doesn’t matter.