I believe you are reffering to his "pocket Bible". I too have looked into this and have been unable to get a clear enough shot of it to identify anything in particular.
I do, however, think the the "Bible of Hell" would be a much cooler prop. Just find an old big black bible. Gold leaf the upside down ***** on the cross. weather it and add black goop then cover in in plastic.
Maybe even go as far as to make some specific insert pages. The ones with the artwork shown in the film. Problem is that its in aremaic.
But back on topic lol, I would like to know what his Pocket bible is as well.