Identification help

Purchased this mount back in early 70's. Was used on sea kayaks before the fishing kayaks came about.
I am trying to identify to purchase more before making some new ones
Was purchased in kayak store in Southern Calif.
Thanks

I searched the web but can't find the exact one you're looking for.  Found this board that might work but not the same.

https://www.aliexpress.com/i/33015128019.html

Look threw these.... Dash board is what I/we call them...
https://www.google.com/search?q=kAYAK+DASH+BOARD&rlz=1C1CHBD_enUS791US791&oq=kAYAK+DASH+BOARD&aqs=chrome..69i57j0l7.6372j0j7&sourceid=chrome&ie=UTF-8

Johnny Bar   https://www.stripersonline.com/surftalk/topic/614393-harmony-johnny-bars-kayak-accessory-bar-for-rod-holders-etc/

I have a Johnny Bar. Mine looks like the ones pictured in mickfish's link. Your's have a flat plate on top, mine does not. I don't think they're on the market anymore. I haven't used mine for more than a few trips. Happy to let it go for $20. PM me if interested.

ernest