Years ago I bought a 'set' of these from a seller in the same town and they were all reprints. It was obvious when I compared them to my few originals that I bought back in the day.
I bought a few items from him.
Some of them are clearly reprints such as the GK signal which are smaller than the only issue I had previously, but these reprints seem not recent: they look like 10 years old laser printing.
I bought also some cargonaut booklets and they had the cargonaut red stamp.
Maybe they are "old" approved reprints that stayed in a storage for many years:
the email address used for paypal makes me think he is indeed Paul Sanders.
I don't know if these reprints have been with IP owner consent (but I hope/expect so) but at least I'm thankfull because otherwise I doubt I would have ever read any of these GK signal zines...