Convert Path Name To Short

I've got a variable path for a file stored in a cell inside a worksheet that I need to convert to the old dos format (no spaces).

From c:Awesome FileFTPMy Awesome File.txt

to c:Awesom~1FTPMy~1.txt

The actual path/file name is much longer and is determined by multiple fillable fields, cells, and drop down menu's so the only feasible way at the moment seems to be that I need some code to convert the file/path name all at once.

After doing a little searching on google I came up with several that could determine the short path name of the actual workbook, but none that could convert a path that was different from the workbook.