Carl Heller ~ partsetal. Carl is a member of this Forum who specializes in Squarebirds parts. He has many parts and also has some Squarebird parts cars. He also happens to have the 1958 bushing sets and also the fasteners (nuts and bolts) for them in stock for separate purchase. So if you need those bushings, check with him!
He can be contacted by sending him a Private Message from the Forum. Or you can contact him by email to firstname.lastname@example.org