One source for Diff drop brackets is ;_
Joe Darlington
darlington-offroad@nc.rr.com
You would probably need to send him yours to modify..or get a set from a salvage yard...and send those.
Joe D is a long time Isuzu guy..great fabricator ... he's making a Heavy duty Transmission mount for me right now..tell him Jo Birch sent ya
BTW... Diff drop is only really required on tires bigger than 33's.
I ran stock diff plates on 33's for many years with no issue..put diff drop plates on when I went to 35's.
Cheers
Jo