Okay, in the owner's manual it says to use Shell advance fork 7.5 or donax TA, but I can't find them anywhere online.Is there anyother brand or type I can use? That sells in the united states.
This article says that you can use Spectro Golden Cartridge Fork Fluid 7.5W (125/150 is 7.5W)
http://www.webbikeworld.com/ducati-motorcycles/gt-1000/oil-change/
There's several places you can get it online... Here's a couple of them: