I hate to say it, but as show chair I had no time to actually check out the demonstration at the division booth. But my experience is that orchids can be grown in any pot that has adequate drainage. If you can describe the pot, I will be more likely to provide a link to a place to purchase them. Differences in pots cause differences in the rapidity of drying of the media as well as the aeration of the media and consequently the longevity of the potting media. The more drainage the better.
Again, if you can describe the pot, I will be more likely to provide a source. Additionally we will have vendors of potting supplies at our upcoming Orchids in the Park (San Francisco County Fair Building, July 25-25, 10am-5pm). I will email the chair of that group and see what he says aas well.