Not exact what you asked for. Maybe you can run with this in the mean time.
This search finds ISBN13
Code:
identifiers:"=isbn:97"
this finds ISBN13 because ISBN13 start with 97
While some books had ISBN10 and ISBN13, not all did and many ISBN10 are different editions, so what does conversion to a nonresistant number get you?
I will bite: Why sort? AFAIK nobody 'shelves' books by ISBN, so the sort has no obvious use.
ISBN was created to aid a bookseller in ordering. They are basically just a serialized order number by Publisher. language-publisher-sequence-check digit (mod10)