Afraid any fresh peaches you find during the winter months in the U.S. will be disappointing. Not the perfect alternative but a trained chef should be able to create a really nice baked desert from frozen peaches beautifully presented that would be very much appreciated. Frozen peaches picked at the perfect time will be much superior to peaches shipped from South America. I would at least consider an alternative such as I suggested. Put on your Toque and create a brilliant one of a kind dish.