Those chrome wingnuts could be done with "lost wax process" but when asking to the people who did that for me years ago ; they do not accept more to cast wax on silicone mold done outside ! they ask to do their own molds and this is the issue as cost of this mold is far away from what we can afford ( in fact they do 2 molds !! one to copy and then when 10or 20 are cast they do the final multicast mold ... so pricy process!!!)
This why at to day I stoped working on possible remanufacturing those parts ( beside the fact since one year am ivolved alittle on my chassis ! )