To “Equipment”, add:-

Some Items are limited to a certain number in the supply crate, and are tracked in the list entry for that Item as “Limited (X).”, where X is the number remaining. When a Pathfinder uses an action in this rule to start carrying a Limited Item, they must reduce its number remaining. If a Limited Item has zero remaining, Pathfinders cannot start carrying it.

Add a bullet point after the fourth in “Application”:-

* If the Equipment applied is Single-Use, cease carrying one instance of it.

If the rule “Crafting” exists, add to the end of it:-

If any of the Tools are Single-Use, the Pathfinder also stops carrying them, as if they were Materials.

Add “Limited (12).” to Gamma Pistol.
Add “Limited (3).” to Bone Scanner.
Add “Limited (12). Single-Use.” to Canister of Glarsh.
Add “Limited (6). Single-Use.” to Rocket Fuel.

Then reduce the number remaining for those three items of Equipment by 1 for each copy currently carried by Pathfinders (to a minimum of zero).