Ok, so out of curiosity I googled "singular for pierogi", and it seems to be "pieróg". But there are a number of (seemingly) Polish people scattered around the Google results saying that this is never used, or incorrect, or refers to only the general form for filled dumplings.

Now I know that in real-world usage it would be unlikely to refer to one, but what if there was a need to? Let's say someone made a statue to pierogi, but due to budgetary problems only one of the several pierogi planned was constructed. A tourist asks you how many pierogi make up the statue. How would you respond? Would you use the singular, like "only one pieróg", or would you rework your response so there was no need for the singular, like "sadly only one of the several pierogi was built"? Which seems more natural?