Just a thought?

I'd quite like a poster of my rack to stick on the wall of my bedroom studio. How about modular grid team up with a poster maker outfit and offer such a service - at a reasonable cost of course!

Well, you can always print the screenshot by yourself?
The only one you can not print yourself is the ModularGrid poster of the 870 most popular modules, because it is not possible to create such big racks on MG.
Reasonable cost is an other thing, those services charge a lot for small series...