Blood
Still thicker than water, but also easier to transport.
The thing about blood is, when it's needed, it's needed fast, and fresh.
Consequently, there's a good living to be made keeping reserve supplies
stocked, and a better living to be made during emergencies.
Cybernetic Limbs
Kick up your heels and clap your hands, because today's
cybernetic limbs are cheaper, lighter and more efficient than ever before.
So much more stylish and practical than the real thing!
Medi Kit
Like having your own personal doc-inna-box ready
to take charge at any medical emergency. No home should be without
a healthy stock of fully operational Medi Kits when the unthinkable happens.
Optic Nerves
Jeepers creepers, where'd you get those peepers?
Probably from the authorized interstellar optics exchange - a nice new
optic nerve is much easier to transport and install than some silly ground
lens, if your vision needs correcting.
Synthi Skin
In addition to its countless medical and protective/defensive
applications, this high tech pseudo organic body covering has become a
popular fashion accessory on many worlds.