I don't have many publications by them as there's just so much out there, but the few things I have are great. I have a couple of later Hopital Brut issues (8 & 10), and two publications by Fredox including the very intense
Dossiers Noirs de l'histoire. The whole French/European silkscreen graphix scene is a rabbit hole I've not explored too deeply but if this stuff was available to buy on my doorstep I'd probably go broke trying to collect it all. In the UK, you can get some of their stuff from
Mark Pawson or Bookartbookshop in London.
Hopital Brut 9 is definitely one of the harder issues to find, given the limited run of 280 copies and complexity of its binding with different sized papers. Le Dernier Cri's online shop
only had 70 copies for sale and the remainder probably went to the contributing artists? I think I read Trevor Brown mentioning in an old blogpost announcing its publication that even he missed out on getting one and he was usually on the ball with their output, so it must have sold out immediately. Happy hunting!