WTB: Tone Arm Retaining Ring for Columbia BI

[drboruff]

Hello. Does anyone have a spare retaining ring for a Columbia BI (other models also use this retaining ring)? The back end of the tone arm rests inside of this ring with the help of a flange, and the largest diameter flange fits between the horn elbow and back bracket. Original or repro is ok. Attached are pictures of the ring borrowed from another phonograph. Thanks in advance for your help.

David Boruff