[Mr70]

Don't do it Tommy.
That first auction,part #344330,is for a 1975 Nova ONLY,nothing else.
It has a U-shaped swinging mounting flange,to contour the lower valiance,different from the one the 1969 camaro used.

The 1969 Camaro used part #3913608,and should have the part no. stamped into the center of the plate backing.The second auction is the design you seek,but is missing the part # stamped into it,thanks to Taiwan.

MANY Vehicles shared the 1969 Camaro License plate frame #3913608:
*1969 Camaro
*1968-71 Passenger
*1968-72 Nova
*1968-72 Chevelle
*1971-77 Vega
And Buick-Olds-Pontiacs all shared this part as well.
I still find these at local swaps for $10.00 or so,depending on their used condition.
They can be found in Junkyards here as well.