Part number 12511-61070 (for the 90 amp alternator) as shown in the pdf doc is what I need.
The first photo is the 80amp LH eng/lower alternator mount. The calipers show the dimension that's too wide for the 90 amp alternator.
The 90 amp mount I need is similar, but the rear web is closer to the front.
The second photo shows the measurement in millimeters of the 90 amp alternator that the mount needs to accommodate.
The third photo is the upper alternator mount bracket for the 80 amp alternator. The 90 amp bracket I'd like to get is similar, but the little tab is longer with a small brace.