The Unimatic rings and cap would really be best reproduced by molding them from a silicone or other pliable rubber material.
All one would need is a really nice original and a mold could be made. It is simply a matter of casting replacements. Once the mold was made multiple rings could easily be cast.
A molded replica could be nearly identical, although color matching may be tricky. Even the lettering would transfer.
3D printing a part like is not desirable. First you will need a scan and secondly you will see the grain that most all 'affordable' 3D printers leave behind. They just aren't all that accurate yet. Finally you would be limited to the materials that a 3D printer can melt and print with.
All one would need is a really nice original and a mold could be made. It is simply a matter of casting replacements. Once the mold was made multiple rings could easily be cast.
A molded replica could be nearly identical, although color matching may be tricky. Even the lettering would transfer.
3D printing a part like is not desirable. First you will need a scan and secondly you will see the grain that most all 'affordable' 3D printers leave behind. They just aren't all that accurate yet. Finally you would be limited to the materials that a 3D printer can melt and print with.