This last item has a secondary item buried within the chronicle sheet, but not listed on Archives of Nethys. Here's the relevant text: If you are an izalguun with 11 ranks in Engineering, you can spend 16,500 UPBs to upgrade the weapon to a Level 11 item, doubling both of its base damage dice (2d6 to 4d6 melee, 2d4 to 4d4 small arm). If you are not an izalguun, you may perform the same upgrade by spending 3 Fame to work with an izalguun Starfinder.
Starfinder Society has a number of items it uses. I figured it couldn't hurt to give you a list.
Armor:
https://www.aonsrd.com/PoweredArmor.aspx?ItemName=Goblin%20Battle%20Jack
Weapons:
https://www.aonsrd.com/WeaponDisplay.aspx?ItemName=Idaran%20Force%20Training%20Baton&Family=None
https://www.aonsrd.com/WeaponDisplay.aspx?ItemName=Membrane%20Holdout%20Pistol&Family=None
https://www.aonsrd.com/WeaponDisplay.aspx?ItemName=Huchket%20Rifle&Family=None
https://www.aonsrd.com/WeaponDisplay.aspx?ItemName=Red%20Star%20Plasma%20Kukri&Family=None
https://www.aonsrd.com/WeaponDisplay.aspx?ItemName=Taserweb%20Grenade&Family=None
https://www.aonsrd.com/WeaponDisplay.aspx?ItemName=Neutriad%20Flail&Family=None
https://www.aonsrd.com/WeaponDisplay.aspx?ItemName=Neutriad%20Pistol&Family=None
Cybernetics/Augmentation:
https://www.aonsrd.com/Cybernetics.aspx?ItemName=Single&Family=Society%20Subdermal%20Graft
Magic Item:
https://www.aonsrd.com/MagicItems.aspx?ItemName=Scarlet%20Prism&Family=Aeon%20Stone
Hybrid Item (which is also a weapon, whee):
https://www.aonsrd.com/HybridItems.aspx?ItemName=Staff%20of%20Nuclear%20Vengeance&Family=None
This last item has a secondary item buried within the chronicle sheet, but not listed on Archives of Nethys. Here's the relevant text:
If you are an izalguun with 11 ranks in Engineering, you can spend 16,500 UPBs to upgrade the weapon to a Level 11 item, doubling both of its base damage dice (2d6 to 4d6 melee, 2d4 to 4d4 small arm). If you are not an izalguun, you may perform the same upgrade by spending 3 Fame to work with an izalguun Starfinder.