LatemodelResoration.com carries replacement and SFI approved performance Mustang harmonic balancers. We carry stock replacement harmonic balancers for 5.0L, 4.6L, 3.8L, 5.4L, 2.3L, and 4.0L Mustangs. SFI approved, and high performance Mustang harmonic balancers also available from Ford Racing, Professional Products, and ASP.
I have been ordering items from Latemodel Restoration for many years. I've found them to be exceptionally professional, timely with order processing and shipping correct items ordered. I've never received an incorrect item on an order.