Preparing food with a knife

I like to cook. My dish to cook is the Chili from a friend's family receipe! My family and friends love it. I have to chop up a lot of items for the chili in doing so.

With the handle cutting board; I do loss a handful of food because I only use one hand and the pieces go off the board.

Advice: I cut onions etc.... all on a current cutting board that has a handle for my left hand to hold while I cut.
The Stroke Connection Magaizine has listed a cutting board that is for one handers.  You need to order these one hand cutting boards via the website.
I have gone into stores that sell kitchen supplies and they do not offer the one hand cutting board. They also do not know where you can purchase the item.