Lord's discog. gives:
26 Oct 1962 WADO radio b'cast "Birdland", NY
Ed Armour (t), Don Butterfield (tu), Charles McPherson (as),
Jaki Bayard (p), Mingus, Danny Richmond (d).
Pepper Adams (brt) is also present on some tracks.
31 Mar 1970 Live from "Slugs Saloon", NY
Bill Hardman (p), McPherson, Bayard, Mingus, Richmond.
There are two vols, Bop 043 and 044. "O.P" is on vol 2.
The 1989 session was indeed a memorial concert. From the Lincoln Centre, NY.
I was lucky to find you, itinerants. I haven't been an ABer all that long, and though I have a look at the music section occasionally I usually give up pretty quickly. There's so much dross. Hardly music. Still, it takes all sorts I suppose, and each to his own.
I am not a particular Mingus fan, though I do have a few tracks of his. I certainly admire his bass-playing. And I like McPherson, and Jimmy Knepper.
If you need any other discographical info. please post the question. My version of Lord's is the latest one, and though it has its drawbacks, it's pretty comprehensive.
I'll be only too pleased to help.