Though not in print on CD, Jazz Realities (Fontana) is excellent!
Featuring Mantler, Carla Bley, Lacy, Kent Carter and Aldo Romano in a strong 1966 quintet formation, it's very high on my list of '60s jazz LPs.
There was a Japanese CD of this session released in the late '80s/early '90s, though ironically the vinyl is probably more common.