Hi Chuck - probably it was Cox Racing as Rodd tracked down. However, for 'normal' vehicles like a Ford I believe there are very many more generic brands on the market that are also pretty cheap.
I installed the Cox bushings on most fittings they come for, except for the large round 'hockey-puck'-style bushings on the rear trailing arms, because I have some small vibration caused (I think) by a slightly out-of-round wheel, that was transmitted too much to the chassis by the polyurethane bushings. Other than that, the car rides well with the other bushings.
Cees Klumper in Amsterdam
'69 white 280 SL automatic