Parse Comp Name As Source Text?

I have hundreds of comps that are labled as like:

"GRID-1XA"

"GRID-1XB" 

Within the comp, I have source text that is attached to the comp.name. That's easy! But I want to strip out the first part of the string, so instead the label would be "1XA." Is there a way to ignore everything in the comp name until after the "-"?

Essentially, I want to remove the prefix of a comp name when using it as my source text. 

I have a work around which is to move all of those "GRID" comps to a seperate bin, name the bin "GRID" and then use AE Global Renamer to strip "GRID-". This works, but then I have multiple comps in my project with the same name which can confuse other expressions...