add findProsthetic()

src/js/itemAvailability.js

@@ -189,6 +189,15 @@ window.addProsthetic = function(slave, prosthetic) {
 	}
 };
 
+/**
+ * @param {App.Entity.SlaveState} slave
+ * @param {string} prosthetic
+ * @returns {{}}
+ */
+window.findProsthetic = function(slave, prosthetic) {
+	return slave.readyProsthetics.find(p => p.id === prosthetic);
+};
+
 /**
  * @param {string} prosthetic
  * @returns {number}