Problem Searching for Numeric Files

I have looked for an answer to this and cannot find it. I have a number of zipped files and folders from a single source that begin with an 8-number sequence followed by _ (e.g., 12345678_). These are the only files/folders I have labeled this way. There is no other unique identifying meta info.
It would be helpful if I could search for these and aggregate them with Hazel; however, I don't see a way to do it in the "If conditions are met" section. Ideally, I'd like to do something like Name - starts with- "[number][number][number][number][number][number][number][number]_". This seems to be an option in the "Actions" section, but not before.
Is there such an option or similar to resolve my problem?
It would be helpful if I could search for these and aggregate them with Hazel; however, I don't see a way to do it in the "If conditions are met" section. Ideally, I'd like to do something like Name - starts with- "[number][number][number][number][number][number][number][number]_". This seems to be an option in the "Actions" section, but not before.
Is there such an option or similar to resolve my problem?