You need to put more than 3 letters into the search engine. Its kind of a wreck in that sense. :/ Most providers here offer duos, just go to the ads section and browse through 2-3 pages you will eventually come upon a title with "duo" in there. Or type in "duos" instead of just "duo"
I haven't tried this Edna. I agree that this is an issue because in order to have a good duo, you need two girls that like to work together. This is why I let girl #1 pick girl #2. On TER and this forum Du reviews get buried and lost. Maybe the best thing to do is to post your duo review in each girls solo thread?