Life on mars wallpaper from back to the future

Living near a city the size of Hull, one would expect there to be a plethora of wallpaper outlets with a multitude of designs to choose from. Not so.
Our local DIY store used to supply wallpaper that you could choose from a number of sample books, but apparently their supplier treat them like a third world country because they didn't buy enough, so now they have stopped supplying at all. That leaves a small independent trader on one of the city high streets, who has apparently closed early for Christmas, and the usual suspects who for commercial reasons I will refer to as Q & B and Basehome. Oh yes and a local cut price chain called B & M, who for commercial reasons I shall refer to as .............. oh bugger, I've said their real name now, too late.
No matter, all of these stock exactly the same wallpaper. There are currently three wallpapers available. Well okay, there are more than that, but to me they all look the same and fall into four categories, which are retro 1970 psychedelia, huge floral designs, Indian Restaurant flocks and the sort of thing your gran would have had in her front room in the 1970's. It was like walking onto the set of Life on Mars.
After an exhaustive search of all four potential wallpaper emporiums and an hour of deliberation we settled on something which was at best a compromise for our dining room. Why are wallpaper designs suddenly so stale and restrictive? Is it the financial recession? Is paint taking over as the wall covering of choice? Or is it a fashion thing, whereby "designers" are dictating what they think we should have on our walls?
In these modern times where we can manufacture objects on a 3D printer I think we have missed a trick. There must surely be a market for a large wallpaper roll printer on which we, the general public, can design and print our own wallpaper, to ensure we get a sensible design of what we want, and not what "they" want to sell us.
Dragons Den here I come.