Hi guys, Sorry if this is a stupid suggestion that doesn't solve the problem.
If you post process a raw file with the SilkiPix raw converter from Fuji, this can apply an Acros preset and then you can further further post process out to a 16bit uncompressed TIFF file. That Tiff file can then be post processed further in Photoshop and Silver effex Pro 2 if required.
The TIFF files are massive but it gets you what you want.
Or have I misunderstood?
Cheers