I don't have an Omega 2 pier from BYO, so I can't help you with a template. I'll bet it is similar to how I had to do my Le Sueur. They suggested an 18 inch diameter hole 48 inches deep. I used a sonotube with those dimentions. After the hole was complete and sonotube in place, with four pieces of rebar, I loaded it up with concrete and used the form and j-bolts they provided to me, it consisted of two wafer boards with the j-bolt pattern pre-drilled. I simply put in the j-bolts into the form and place them into the concrete with the bottom wafer board flush on the concrete and had it aligned north. You do have to be ready to place the j-botls and wafer board right away, because they can be hard to push into the concrete if you wait too long.
There are a few photo journals of the process that I found helpful, take a look at this one: