Yes P-Henny, you are spot on. not display cases/cabinets of which there are loads of places that do them, but as you say "put original full train set in its retail box and put such box inside a clear plastic box for additional protection i.e. not necessarily a box for display, just protection. I spent a few hours last night googling and looking at all sorts of companies but seems unless one wants to spend £100-£200 for clear plastic boxes depending on size and thickness quality, they don't really seem to exist, it seems. Thanks.