I am searching for authentic Bengali translation of Padma Purana with Sanskrit sources, specifically the portion of Uttar Khand containing Glorification of Srimadvagabad Gita (Chapter 175-192, Part.VIII & IX of N.A.Deshpande's English translation). I have uploaded the relevant portion (English) here. If Bengali translation is unavailable online then can any linguistic scholar help me by translating it.
Atlast I got a physical copy of authentic book of Padmapurana with both Sanskrit verses and corresponding Bengali translations. It matches with the English version I uploaded earlier. I have scanned & uploaded the relevant portion here as I reasonably feel the copyright has expired. Gradually I have uploaded the contents in Unicode Bengali in my Hindu religious blog. So my main question is now fully answered. Thank you Keshav'ji for helping me get the answer. The complete reference is:- "Padmapuran, Uttarkhanda (Bengali)" by Veda Vyas, translated by Sri Tarakanta Debasharrma, Krishnadas Shastri and Sriramdas Shastri, edited by Pandit Panchanan Tarkaratna. Bangabasi-Electro-machine edition, 1915. Published & printed by Sri Natabar Chakraborty for Bangabasi Karyalay, 38/2 Bhabanicaran Datta Street, Kolkata. First Nababharat Edition, 2013 (with identical page layout). Nababharat Publishers, 72 D, Mahatma Gandhi Road, Kolkata-700009. 1062p.