Hi, Chris,
I don't ever recall seeing one. I just took a quick scan through the available string functions in CR10, and didn't see it. You probably could write a small forumula with the other string functions to build a padded string yourself.
Personally, I only use forumulas and Crystal functions when I have to, and usually just for the presentation of the data. Things like padding I take care of in the C# function that builds the report data - so I'm really just using CR as a presentation vehicle.
Kevin