Help Finding 52" Light Bar Bracket

[BlackTomC]

Good morning (afternoon or evening depending on where you are),

I'm redoing the headliner, installing insulation, basically upgrading the heck out of the interior in my 76 Suburban, before I can put the headliner back in, I'd like to mount my light bar (bolt it in) and am having an extremely difficult time finding a bracket. It's hard for me to believe that no one manufactures brackets for these old square body Chevy's.

Any help is much appreciated. Quote for bracket is $260 at local shop here in Phoenix