Item Finder
Look through this quick tutorial for instructions and tips for this script.

Time to initialize values: 0.0089890956878662 || Total running time: 0.0094990730285645
Thanks to Agamari, Drunkenduo, Nightmyre, Squee for data and feedback while making this script.
Also thanks to Lemmy and Master Chief for suggestions of graph algorithms for this problem.
And to all those who gave comments and ideas while the script was being written.