I wasn't able to find much information on place settings. I found listings for dinner plates (up to 3 in a single listing), a cake stand, a meat plate or platter with a ridge to collect liquids, and a gravy boat; all in Palissy's Black Prince pattern. In the Black Prince pattern, I have also found a tea set with tea pot, sugar bowl, milk jug, and 3 tea cups with saucers. Also in Palissy's Black Prince pattern, I have found a coffee set with a coffee pot (taller and slimmer than the tea pot which had the usual round squat shape) with 4 cups with saucers. I couldn't tell from the pictures available whether the cups and saucers with the tea set were the same or different from the cups that are being sold with the coffee set.
I'm sorry that I couldn't find the specific information that you were looking for on dinnerware.
You have options on how you would like to proceed with your question. You can accept my answer to this question and it will close and I will be paid. If you choose that route then I will be happy to continue working with you if you would like any additional information and I will post any additional information that I may find in the future to this question. Or, I can opt out of this question and allow another expert to add further information to it, if any other experts
have information. Or, you can accept this answer and open another question with a new price on it. If I opt out of this question or if you open a new question, we can try to move it to the antiques category and see if there are any experts in that category that might have further information. I'm not sure why the moderators that spoke with you while you were waiting for an expert to answer your question didn't suggest moving your question to the antiques category; but given how long you waited for an expert in the general category to help you, I don't see why you wouldn't have a better chance to find more information in the antiques category. The moderators may not have suggested moving your question to the antiques category because some of the categories have a higher minimum price for a question than others and the price you offered for your question may have been below the minimum price for the antiques category (I'm not sure because I almost never see the site from the customer's point of view, unless I'm asking a question of my own.) It might be better for you to open a new question and send it to the antiques experts because if there is a minimum price for an answer, you will receive that information when you open your question.
I have enjoyed working with you and I'm sorry that I couldn't give you the exact answer you were looking for. I hope that you can find the information you need and I wish you all kinds of luck in your quest for the elusive Black Prince complete dinner settings. Have fun searching! Often, the harder the quest, the more valuable the prize and the more satisfaction you receive from having succeeded.