RE: Bantam-O&R-OK Engines info needed.
Try getting in contact with the MECA (Model Engine Collectors Association). If you plan on taking a trip to the Toledo show April 7, 8, or 9, you could stop at their booth.
The only address I have for them is Bob McClelland, 3007 Travis St, West Lake, La 70669. If you write, might be nice to send a SASE.