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MTS doesn't allow downloads of items which are included in EPs/SPs without you needing to buy that SP (if that makes sense).
In any case any objects based on objects from this stuff pack usually rely on the in-game files, so they won't work without that stuff pack.
You can buy the stuff packs these days for a couple of £, $, whatever your currency is in second hand stores or on the amazon, ebay marketplaces and similar. Or you could contact EA and see if you have any luck with getting the Ultimate Collection.
I use the sims as a psychology simulator...