I don't know if I fully understand the problem you're solving for, but it sounds like you're looking for a report link that would point at some existing data, but in order for this to be useful, the record for which you would be displaying the report data would need a common value with the source of the data you're pointing the report link at. For example, if you have have a table with Site # records, you could point a report link at another data set that also shares common Site # field values. If you do not already have common field values between the table you'd be displaying the report on and the report link endpoint, you could also create a formula to reference the report link against.
