We get many requests for alternate lengths of hookup wire and ribbon cables. One trick for finding these is to use the “base” of the DigiKey part number. For example:
MTF1007-100-ND is 100 feet (as indicated in the -100 portion of the part number)
If you only search the base part number of MTF1007, you will return 6 results in different lengths.
This may not work in every scenario, but it is worth looking into.