I was told that they are DDH-05, DDH-06, DDH-07 but I kind of question whether that is what they are. I know one or two are probably limited make up models from Volks which were customized. I'm not one hundred percent sure the head sculpts themselves aren't limited and with the heavy customization it was hard to tell, but that may have been correct. They seem to match up pretty well with those head numbers. Also in the lot was Haruka Amami from Idolmaster. Her head was customized too, but not to too harsh of an extent.
Note- The three heads on the blanket are the three heads I need bodies for. The bottom two heads are heads I already had on other dolls that I decided to switch out for now. The head on top is one I received recently.