WANTED: Columbia BG or BF end caps 2-4 minute

[erunltd]

I am looking for a Columbia BF or BG 2-min end cap; and/or,
a Columbia BG 2-4 min end cap. If you've got
any of these in your spare parts let me know.

Thanks for looking, Harry

[erunltd]

Photos added

[Curt A]

FYI:
The 2/4 minute BG or BF, did not have end caps per se. The 2 minute end cap (as shown) would be replaced with a 2/4 minute conversion gear train, which had a special cap to cover the gearing, and a partial cap with a slotted stud attached for the selector switch to lock into. The whole gear train is permanently attached to the end of a special, longer, feedscrew and both 2/4 minute conversions are specific to each particular machine... neither of which are interchangeable.