OK, time to get sneaky.......
From the numbers posted on the previous page by OM. 9M-7738 Turbo Group services to 3S-3510 which in turn services to the latest available P/N 3S-4259. Not much use because all three Part Numbers are discontinued by Cat.
However what those three turbo group Part Numbers above all have in common is the turbine housing P/N 7M-9901.
I can find that same P/N turbine housing illustrated on other turbos. So forget the rest of the turbo for a minute and concentrate just on the turbine housing. This illustration is taken from the Parts Manual from a 53A-prefix 977H track loader. A bonus is that it even shows the famous 3rd hose........!!!
So if you want a turbine housing the Part Number is 7M-9901.
The V-Band clamp that fixes the turbine housing to the centre housing is 7M-9916 and the corresponding Nut is 7M-9918.
The compressor housing on the illustration is the same as yours, 8M-3264. If you want to replace the V-Band clamp for that side of the turbo as well the P/N is 7M-9917 and it uses the same nut 7M-9918.