Concepta, how do you want us to talk to you since you don't read PM's, I am looking for a nice top gun..... Please tell me now you want to be contacted. Please.
You using a CNC milling machine?
I would do an exact 1:1 cad model, then take that model and make a moulding model with shrinkage allowance + machining allowance.
And when you machine it, leave some allowance for polishing too.
I believe the gen would just be cut from a solid piece.
As it's gold..... Melt down the swarf !
In my experience the 3d scans are not that smooth and there's lots of work needed cad wise to make it work.
Best of luck to you, let me know if you need any help.