I've mentioned HoudahSpot plenty of times, but there's an app that's been around since about 2005 that has been continually updated and only costs $6-10 that's worth checking out if you constantly run into hard-to-find files. One major benefit of Find Any File is that it can search your NAS and doesn't rely on Spotlight for indexing. Searches can be a little slow but they are VERY accurate. Allows saving searches and search templates, and can export found files as a list for use in scripting app...
