For anyone with $20,000 lying around doing nothing, you can get the original blue sweaters worn by the Core Four actresses here.
https://entertainment.ha.com/itm/movie-tv-memorabilia/costumes/lisa-whelchel-blair-kim-fields-tootie-mindy-cohn-natalie-and-nancy-mckeon-jo-group-of-four-signature-eastland-school-total-4/a/7318-89635.s?ic4=ListView-ShortDescription-071515&fbclid=IwAR3-xBBFMai0pL3k2cTmvAtuP0tuHtfibiRUWsCNzGUHbViVHNIa-duLHng