Just so long as you consider this. I can imagine Fenspace trying deliberately to be self-suffucient in necessities, because of a fear of being cut off. Some degree of automated magic assembler is quite concievable with handwavium (with all the benefits and disadvantages of that). However there have to be limits and there are a lot of stuff that it would be much easier to get from Earth, unless you have trek replicators for everyone (and then you'd have an almost unrecognisable post-scarcity society).
And tramp traders (and smuglers) are a large part of they mythos.
And tramp traders (and smuglers) are a large part of they mythos.