In photo, I just made a pretty useful (raster) calligraphy pen in 5 minutes for an upcoming project. I made a 4 px wide x 65 pixel tall selection, filled it with black, and saved the "selection only" as a png. Then in the brush panel I opened up "new image brush" and selected the png. In the brush attributes I set the spacing to 1%, the rotation to 6% and the size jitter to 43% pressure. It worked great! You can play with the rotation to fit your needs. I'm not a calligrapher by any means, but I do need to do some "Hebrew style" calligraphy in an upcoming project. After a little practice, I think this brush will work ok.