Since I have several Kato passenger sets with the "bookshelf" style case, I would like to use these for all my passenger trains (Acela, Lakeshor Ltd, MBTA commuter and Conrail OCS). Although Kato (as well Tomix, Greenmax and Casco) sell empty cases, the foam inserts are specific to Japanese trains and would not fit these specific trains. I would like to cut my own urethane foam inserts, but don't know a good source for a match to the type Kato uses.