I have finally made steamed red bean buns with the help of a fantastic bao mix that I bought from Ranch 99.
The instructions are in English and are very easy to understand. I used my electric mixer with the paddle attachment to mix the dough and the dough hook to knead it (the mix requires 45 minutes total kneading time). When it came time to making the buns I used a rolling pin to make the dough thin.
The final result was delicious. Using about 1 to 1 1/2 tablespoons of sweet red bean paste seemed to be ideal. I steamed the buns 4 at a time in my small steamer for 15-20 minutes. They reheat nicely in the microwave.