Bob3, nothing yet, but I do know he's reading these posts.
I have no idea how many firm commitments he would need to warrant the cost or how many he would have to sell.
I think the ACL caboose from Shapeways is HO not O, at least that's the impression I get when I look at the photos (one caption says it's HO). Still a nice looking model and just maybe the maker would be willing to do some in O.
Don't know what he did to burn bridges, but I can only guess they were in defense in his answers concerning some of the demands made by some O-scalers. I'll let him and others weigh in on that. Having made/sold a few items in another hobby I can only say some folks want something for nothing.
Of course these would likely be more expensive that what Atlas puts out, but so are all of the cars made by the other smaller manufacturers. If someone can get Atlas to make these SPECIFIC Seaboard cars then please do so.