Congrats!. I'm so close myself, had such a lackluster evening of getting the last few items / forming meatboy & bandage girl. Managed to get another Book of Revelations on floor 1, and the womb boss was Conquest again, it has to be broken, Conquest is supposed to be rare.
Thanks! Getting the last few items I needed was incredibly frustrating at times but you'll get it eventually if you keep trying.
I managed to get a completed Meatboy without even trying during a normal run, but I always ended up 1 piece short for Bandage Girl. Eventually I got her during a farming run by abusing the Monster Manual with the Sharp Plug. I used the Sharp Plug to recharge the Monster Manual and I had Pyromaniac and Epic Fetus to heal myself. Unfortunately getting them any other way seems to be too unreliable.