Classic Industries part # 3892756. They're listed as a 1967 Camaro / Firebird Rear Axle Bumper, but that's what you need. I've put them on both my 70 Parisienne & 70 2+2 rag. Add it to your shopping list.
Yup, they're there as I can see them in the photo of the backside of the spindle.
Just for the benefit of others following this thread and your build, the Classic Industries part # front lower control arm bumper is 3939198. It's listed as 1962-70 Control Arm Bumper.
-- Edited by seventy2plus2 on Thursday 22nd of February 2018 08:05:53 PM