I just looked. I didn't make any drawings of my sump guard.
My sump guard is pretty much just a piece of 3mm black steel with a bit cut out so I can drain the oil and a 90 degree bend at the front.
It's mounted by 2 bolts at the front and 2 or 3 at rear (can't remember).
I've used all holes that are already in the chassis. The front holes need a bush, as the front of the hole is one size and the back of the hole is a bit larger. I got these made up at a local metal place.
I've secured the rear of the guard to already existing holes in a crossmember behind the sump.
On the guard I've welded some 20x40 RHS (I think it is) to give the guard a bit more clearance off the sump.
It's really quite a simple guard to build if you have any interest in doing so. From underneath, take off the splash plate that covers all the belts etc and just have a look around, you may be able to work out what I'm talking about.
I do have a plan for the transfer case guard I built, but I'm hesitant to hand that out.