Sorry about the very long delay in responding; we've had a serious problem with an uncle for whom I'm legally and financially responsible and I've been out of pocket for more than a month. Just now able to get back into the fun stuff now.
Since SBA and Lorenz were the same thing, or fundamentally the same thing, the suggestions this antenna was for the British SBA seem correct. As I noted in my original post, the B-24Ds already had the "thin wire" antenna in the same basic physical configuration for the American BC-357-B Marker Beacon Receiver, which I think operated on 90 or 150 KCs (yeah, I know they're KHz now, but that's what they called them 74 years ago!), so I assume the SBA system operated on different frequencies, therefore requiring a new antenna. Anybody know the freqs for the 1943 SBA?
Thanks to everybody for their help.