Ok, I think I finally sorted through all the confusion and it pretty much boils down to this:
The Sam Spratt giclee will only be for sale at the two brick & mortar pop-up stores; and they will go on sale to the general public starting tomorrow morning (Friday) at 10 AM.
I finally got ahold of my NYC buddy and he can pick one up for me, provided there are still some available on Saturday.
He can't make it tomorrow. I have to hope they don't sell out tomorrow.