NSG, I used House of Forgings direct and called their sales line and asked to price match my quote from Cheapstairparts.com. They did and it was the best price I could find. Shipping was fast and service was good.
I just installed two on my new Wayne Dalton doors. I have 12' ceiling and didn't want the obtrusive look of the opener unit and track hanging down from the ceiling. Kit is ~$66 and bracket is well built.
Looking at you picture it should work fine. They have a video on their site of the side...