Browsing through both Smurfy.de and the old MechDB:
Q: Please help to advise when/how were these Hellspawn Special Variants were offered?
a) HSN-7D(S) ==> Smurfy.de & old MechDB
a) HSN-8P(S) ==> Smurfy.de
b ) HSN-9F(S) ==> Smurfy.de
At the risk of divulging my age, there's that song that say, "...but you only want the ones you can't get..."

Sources:
https://mwo.smurfy-net.de
https://mech.nav-alpha.com
Edited by w0qj, 22 October 2021 - 04:07 AM.