Olympus Z-drift compensation (IX2-ZDC) autofocus system for Olympus IX81

Hardware
1

Hi there, our Olympus Z-drift compensation system (IX2-ZDC) is not working,
probably because the laser diode output is 15uW (12% of the expected maximum),

Any idea of where we can get a IX2-ZDC? It has been discontinued by Olympus
thanks!