one thing i've found to do, this isn't a specific where it is, but in general, is if dls search or razor back's tarl, can't find it exactly, is to look up just the first main part of the kuid, that's the person that created it, and look at all their stuff to see if maybe that partiucular item's been created with a newer one with a different number. also the prefix single digit is/seems to be, if the id kuid person has more then one dls acount, such as for example if they have and create for different versions. basically you have to drop the prefix and suffix numbers when searching on the dls, then the single digit suffix number, is revisions. dropping it won't lead you astray in the search because the dls seems to list in reverse chronological of creation date, so you'll come to the newest first, then if you see multiple revisions of the same item, you'll see the newest has the highst suffix number.
the other thing, if it doesn't show up, is to check ALL the version boxes, something i learned the hard way.
still one more thing, that usually helps, is if you open the download page for the main asset the missing assets are missing from, usually there's a list of all the sub assets, and sometimes you can find them that way, even when the main search engine says "no assets found".
finally, if its really NOT on dls at all, there are other sites with downloads, and chances are it came from one of them.