Hi,
regarding metallic bone replacements - I have print, yeah, rare one, but also offer rare service - free of charge craft of it on your materials (collateral option for materials provided is open for discussion). Also see "Auktuma's crafting services" at services section here on PCF.
I never stopped surprising how community resources are wasted - people tend to be independent (what really means to wish to stay lonely), low care about cooperation, communication. I have invested much to offer services (using skills, blueprints) and I had many offers to community here on PCF as well as through PMs in game. It seems that speed of real life, abundance of trash information, wish of exploiting, to be smarter lowers our investments into trust, care, cooperation - we hardly find time for to look around. (I'm not saint as well, victim of same speeds - do not spank me too hard for words I emitted above. Objective reality. No emotions).
I research thermodynamics and stuck to same question as many: what is the role of living organisms regarding entropy. Could we, organisms with brains, oppose to growing entropy, to win from that and how. And some "ground level" of these come to why I'm skilled, why I have wide collection of blueprints, why I offer services... I wish you to think a few seconds a day also on why you need rare. Just to rise entropy or to offer order (=structured service) to lower entropy.
Think also on why this media got Entropia Universe name
You will have answer to question on this thread.