Anthony,
I can answer some of your questions, given that my 2010 FG has the ATW coil conversion.
Yes, with the coil conversion the whole truck is definitely sitting higher than the standard FG. If you want to compare to yours, the bottom cab step of mine is 670mm off the ground.
It is a 15,000 lb winch capable, air bag compatible, alloy bullbar and it is made by Custom Alloy in Qld. The bullbar/winch mount, as you have correctly identified, is steel. Mine has the same bullbar.
As to making stuff here... I will leave that one for John to answer.