rule in this circuit is that a new privilege should only be recognized where there is a `compelling justification.' International Horizons, Inc. v. The Committee of Unsecured &editors, 689 F.2d 996, 1004 (11th Cir.1982) (quoting In re Dinnan, 661 F.2d 426 (5th Cir.1981)). The Eleventh Circuit has explained that this strin