Marco could definitely do the job if you have a pattern for him. I have a DG arm for the YZ80E and the differences are subtle through the years. Early arms had a single strut between the upper and lower attachments, later models have twin struts and some of the last ones have extra gusseting as well as twin struts.
DG basically modelled the swinger off the OEM part but usually lengthened the arm and of course fabricated out of Al Alloy and anodised Gold for that signature DG Trick appearance.
If you can live with a very good replica, contact Marco (Allyfab) and discuss your requirements with the man.
How did you go fitting the Billet Clutch Basket?