I have also, incidentally, been researching print-on-demand card companies, like the kind who can make Tarot cards to order, with an eye to a potential Kickstarter (or the like) to get the World Goddess Oracle published. Most of those don't allow for a book, which I have to admit is rather freeing, as that's what's been holding me up all this time. I now have no idea about a book, though perfectionist-me of course wouldn't want anyone else (i.e. someone who is not me) writing it.
I'm not sure how much I should say about the writing, I guess. I will say that a few years back I got a brutally negative response to a question about it (not here, don't worry, you people are all lovely) and it proved extremely discouraging and disheartening, such that it has caused me a good deal of anxiety (I may be especially sensitive—or sensitized—to that).
So far what I need from the print-on-demand card companies are both a) the correct card proportions or the ability to do custom sizes, and b) the willingness to print some artistic nudity, ideally up to and including the Sheila-na-Gig. I ain't leaving Her behind, dammit.
But a bit more research is in order.