If you search around GZG, there is at least one medical crew and a couple of groupings that include casualty figures. I know I ordered some of both.
Interesting idea to convert the cart pullers to other tasks. I think I will keep them as cart pullers, though. I like to think of the rebellion as a mix of high tech and low tech - but mostly just those who don't like being under the toe of the empire or sometimes, anyone else. Han Solo certainly springs to mind.