I used to grow up in the area where the monument is.
Until recently when the corporate HQ for Malaysia Airlines shifted to Kuala Lumpur Intl Airport, a short memorial was held on the anniversary of the event. I seem to remember it being held in front of the admin bldg 4, complex B.
Don't know if this practice continued at the new HQ but its doubtful as it looks like management wants a clean break from the past.
Pic of the memorial attached.
Google maps 1°29'46.9"N 103°45'39.3"E
Anil