In the Star Wars universe, the concept of clones is not new. Obi-wan, when he learns of them, is somewhat versed in the basics of cloning and able to ask relevant, on-topic questions. This suggests that clones are not unheard of, and some of the techniques of cloning are taught - on a theoretical level - as part of the basic education of Jedi (and possibly regular Republic citizens as well).
During the war (according to the EU) Spaari cylinders were used to grow clones in around 1 year - these are highly illegal post-Clone War, and were apparently rare during it.
All of this speaks to cloning being relatively easy, yet the galaxy seems to lack some fairly clear off-shoots of this technology, such as replacement limbs/organs. In the real world, such things are potentially viable within the next several decades, despite the fact that our cloning technology is ages behind that which the Kaminoans demonstrate.
This makes me believe that cloning is more a specialist tool, an area which doesn't get much study or that wasn't seen as viable for whatever reason.
Is it that difficult for them to make clones? Or did the entire galaxy just turn a blind eye on the potential medical benefits?