human skull analogue

okay first off just so you know I'm saint .357. it seams my account was hacked and or deleted and while i work on getting it back I'm using this account. now that's out of the way I'm thinking if doing a new series of testing everyday objects and professional weapons for zombie uses. which means i need an analogue for the human skull and spine. in the past I've used coconuts for this, but the jury's still out on the comparison to the human head. and since i cant afford one of the deluxe ballistic models like they use on deadliest warrior (even though i do know where to get them). i was thinking of a pigs head. now Ive spent all day looking up human skull analogs and i have come up with nothing (damn you Google). so pigs head is the best i can do. now even though i know a pigs skull is harder then a humans i figure that's all the better. but the problem arises where do i get a pigs head. true butcher shops are becoming harder and harder to find, so i posse you this question. do you think i will be able to get a pigs head from the meat department at pathmark? my gut tells me no but i just though i would ask before i walk over there tomorrow. also if anyone on here has a better analogue, maybe one of you know what kind of fake skull they use for those ballistic dummy's, again Ive searched and found nothing on my own. i now put it in your hands lost zombies. if you want to see truly accurate weapons testing then post your knowledge and opinions in the comments. and as a bonus what do you think i should call this new show?