Looking for unubtanium part ideas

the 68 Gts grill Center nose was being reproduced by toysnparts guy on eBay . He sold them through Laysons . He stopped several years ago . He is now selling the original one on eBay for $4000 . I have make several 3D printed one but not out of metal . A company told me they can but it would be 1% shrinkage. I have a 3D printed one to try.
I have also made the 4spd side cover and sold a few because I hated that some one else did it and wanted $200 plus shipping for it . Mine was $100 ship included