I'm not a knowledgeable enthusiast but my husband is. I want to get him a working model (ready made) of an OO gauge S15 for his collection. Have been looking for a while but they only seem to come in kit form. He's 80 and a stroke survivor so hands not steady enough to build one. Does anyone know whether there's a ready-made S15 or, alternatively, someone out there who would build one for me from a kit? Willing to pay, obviously. Ta very much. folks.