Houston or anyone else I hope you can help me.

OK so my P5X ebmod busted a block this weekend, one of ears on the block is cracked off. This was an 05 EbMod REX P5X that I got brand new just a few months ago and only had 2.5 gallons on it.

First question, will a regular block work, or did EB used to make mods to these blocks as well? Second Q, will a later gen P5 block work if there wasnt mods made to the original? I figure the newest model P5 block wont work but maybe the gen just prior to this will. Any help would be great as I really want to run this thing some more, I think it was the fastest motor Ive ever had.