Actually, after some further thought, I think I could do that kind of commission!
The kinds of backgrounds you want are exactly the sort I'd been thinking of making but hadn't gotten around to, since I had also noticed how incredibly hard it is to find western style interiors, and would also like other devs to have access to stuff like that. And money is very motivating ;D
That said, I have health problems that mean my speed and ability to work on art can vary unpredictably. And since I haven't done this sort of commission before I don't have a set system in place.
Is there some way I could contact you privately to discuss the details?