Welcome to the Yamato Valkyrie addicts club Lacerta!
I have just recently started collecting them myself, with my first and currently only being a 1/48 VF-1S Roy Focker with Super Packs, but I have a 25 anniversary VF-1s on order.
I guess its true you cant have just one
As to HLJ showing the Focker VF-1S as discontinued, my understanding is that Yamato discontinued it before but brought it back due to demand, same as what they have done with the VF-1J MAX and the VF-1J Millia. So yours might be the last or Yamato might make another production run.
As I said welcome to the club, and ignore the screaming your wallet will be doing over collecting Valks. Now forme to go and figure out how to afford my next one, maybe I can sell a kidney or something.