That article is a great resource! It looks like they don't provide a form but perhaps they'd be willing to share it if you got in touch?
I'm not very familiar with the DCE technique but I believe that a key component is randomizing the combination of values in the grid and knowing which choices were displayed to the survey-taker, is that right? If I'm following that correctly, I would recommend some of the techniques described here. In particular, I would create groups for each possible grid and then use a random number to choose which one gets presented. That way I would know exactly which grid the enumerator saw and which combination they chose.