Just an idea for LD 2.0 whenever DTG get around to it- let us do coach interiors as well. This came up when I was doing a cream-and-crimson 314 for Cathcart: the very visible blue upholstery is just wrong.
I don't see why not; if we can make up our own original exteriors, or copy real ones for that matter, I would expect the situation wrt upholstery would be exactly the same.