Rallye dash thumbwheel radio rear mount?

[hemiorange]

Is there a rear mount/support for a thumbwheel radio for the rallye dash or is it just the two front ones that attach to the dash frame? It’s for a 1970 Dart Swinger. All that weight seems like it would sit on the ashtray below.

 

[cosgig]

There’s a rear support bracket. I think I have one on a scrap radio.

 

[str12-340]

I have a bunch of that type of bracket, several different types, maybe someone could at least post a pic of the right one and he could find what he needs...