Regex join, Wildcard join or "Like" Statements

I a trying to join on non exact fields

 I have tried using a fuzzy match tool, but it really isnt what I want, it returned a match of 40 for this.

you can see from the above Mapstring column that the intention of the mapping is that it SHOULD match the pattern  "rta/podcast/" with "/ttt" following it so the above match is a false positive.

Yes I know you can exclude matches below a threshold, but I want more precision in the matches

It sounds like a job for REGEX to me, but is there away you can use REGEX to join?

Or, in SSIS there is the ability to join two fields and then alter the SQL so that you can use a "Like" statement, is there any similar functionality in Alteryx?