...man that was a lot more trouble than I thought it would be.
There was not enough space for the Bozure Isolator PCB inside the unit so I ended up with a separate rackmount box connected by a DB25 (parallel cable) to hook it up.
Internal power supply was removed (this was a very early MP24, before the external brick), and upgraded to a Soundcraft console DC power supply.
Really sounds nice. The LME49720s were causing oscillation so they had to be "downgraded" back to TL072, but still very nice. (I tend to prefer my mixer to be very clean but still "analog" sounding.)
Knobs by SIFAM, VU meter by Hairball.