Uncommon Carry Transformer Toothpick Crossbow

How do I get this crossbow ?

I'm a mechanical engineer and I find this product intriguing. It's perfectly ok if the frame is wobbly, bent or if it has minor flaws. Those are only to be corrected, and it's a perfect base for me to modify. But for someone less intrigued by fiddling around with the mechanics, I could understand the possible disappointment. :)