Flexing the Contains Specification in Auto-Tagging rules

Apart from the inability to make a small modification to tagged transaction with the rule as “Confirm” (there is a topic out there on the forum) I find it quite frustrating that by definition in the SQL LIKE clause, string search functions and the powerful REGEX routines (Regular Expressions) that I cannot look for a simple pattern such as AAAAAA%BBBBBB which would search for any string value bounded by AAAAAA and BBBBBB. I have attempted both % and * (asterisk) which are pretty well industry standard.
As an aside I would have liked to have the description searched for a 7-digit (and only 7-digit) number which I can do with some heavy excel functions but certainly with the REGEX functions.
Thanks,
Nigel