@anthracite ... not that you don't have more profitable uses of your time, but have you considered doing dustjacket versions of these, with the spines and a couple paragraphs of flavour text on the back plus a few promotional quotes by authorial peers? For fans to stick over other, lesser books to brighten up their bookshelves?
@Momentrabbit
I can't say I have!
I know Matt Howarth made a few faux album jackets back in the day...