I think you mean left-aligned, which is what General defaults to for text, but in any case those were exactly the problems I ran into when I tried to use Justify to make this happen. The only thing I can suggest is that, if this is a one-time deal and the text to be stretched out won't change, experiment with spaces between the letters to see if that might look OK. Caution: if the spreadsheet might be used on other computers that could have different versions of the fonts or other system-level differences, the results of this sort of hard formatting can look weird.