A-Body Power Booster Brake Support Brace

I need the support brace (p/n 2823604) for my A-Body power booster brake. The brace is vertically mounted and attaches between the booster bottom and to the firewall. The horizontal bracket I have installed but am missing the vertical piece.
A very detailed person (judge of fine MOPAR cars) discovered this piece missing on my (almost) 100% restored 1968 Dodge Dart/270 SL-6. Did not know it was part of booster assy install (A and B-Body I think).
Anybody have one for sale? I will media blast and paint the original color

Love MOPARS.....Enjoy Fall.