MEPLA 600.010.02.00

Thanks for posting. The 32-089 is certainly possible, though the right-handed bracket has a characteristic added 'slot' to it I am not sure your hardware has or requires. See below. My other thought would be the 32-119, which is very close in terms of the size of the gap that accepts the track. See what you think.

Profile diagram of 32-089

Detail of 32-119