4000 Firewall Bracket?

[Mark R]

Is anyone manufacturing these?  Are there dimensioned drawings available?

The reasons I ask: I'd like to put one on my (new-to-me) 4KQ, and my main
business is a 50,000 square foot metal fabrciation fabrication company with
wire, sheet metal, and tubular product capabilities, inclduding in-house
powdercoating.

So, are they available?  Who designed it?  Any contact ideas would be
appreciated,

Mark Rosenkrantz