The first chiddush was also published (with some small changes - in Melamed L' Hoel Part 3 No. 125). The second chiddush was never published anywhere else as far as I know. I would point out that the substitution of Gemara for Talmud was a result of an attempt to confuse the Censor's during the Middle Ages when the "Talmud" was outlawed (similarly in 16th century Italy only the Rif was available for a similar reason). The thrid chiddush is discussed at greater length in his piece n the Beis Vaad L'Chchomim that I hope to place online soon.