I just found this thread here.
Don't worry, the tank fits on the frame very well.
I do have a picture ... but not in the snow:

My mountings also look very selfmade.
You should be able to build some yourself. Just go ahead.
The front one is very similar to the one for the 20 liter Acerbis gas tank.
You only need some big rubber parts to push the tank on.
In the back I only do have a simple aluminium plate.
Take care that you so not take screws too long in the back ...
Good luck!
XTom