Best way to "smarten" odd ellipsis pattern to U+2026?

I have a book that has ellipses in pattern of repeating no-break space (U+00a0) and a regular period:

i.e., as " . . . "

Smarten Punctuation in Calibre doesn't catch it -- what's the best way to turn it into a U+2026 (horizontal ellipsis) using Calibre?

Thanks for any suggestions!