Or you can use the link provided, first part is the author so you put 52779 in the first box next to where it says enter a kuid. The second number is the item, put 54000 in the second box and click search, third number is optional if you need a specific version 1 2 3 4 5 etc.
For 52779:54000 there are ten results, all on protrainz, looks like included as part of a pack, honestly it doesn't get much easier.