So my quest for refractory cement/fire clay came up empty. I was able to find black pipe that I hope will work out. It is 1" inside diameter. The 1 1/4" was just a hair too big and would have meant cutting on the cast iron. So, attached are a couple of ideas I have in mind as well as a comparison of the size differences in the pipe.
The first and second pictures are just using the cut off end of a coupler to set the pipe in place. The third and fourth pictures are an idea I have of using a 90 degree elbow to provide a side blast. What I don't like about this is how high up the elbow is. Not a big deal I guess, just add more clay and build up higher, right? So far, all the pipe and fittings, except one, are in returnable condition.
Oh, and how do I add attachments in-line with my post?