Unfortunately we still don't search these files. I have tried some tests here to see if it is easy to trick VA into searching these files, but they have their own specific syntax, so a sensible check will require some understanding of the file format.
I have noted on the case that you are still interested in this:
You can have numbers after the function names, or keywords. But yes, in general, for this file type it is just a search and replace. But we need to be careful extending to other file types, since the extension does not always guarantee the nature of the file.