Sheet Index - Multi-Line Text for a property

I am trying to come up with a strategy for a custom Sheet Index property (In my case a Project Name) that may need to be anywhere from 1 to 3 lines when placed in the sheet seed title block and the final result needs to be properly center-center justified.  Using a separate custom property for each line doesn't work, as they populate with "####" if you leave the property blank and it wouldn't justify properly for a 2 line Project Name.

This would be a place where being able to put the old school "\010" in the property's value for a carriage return would help, but it appears that doesn't work at all anymore.

The Sheet Index is finally working well for us with regard to numbering.  It would be disappointing if we ultimately had to adjust title block text on every sheet.  Hopefully, there's an obvious solution and I'm just missing it.