When I bought my 69 RR last month it came with an AAR brand lift-off hood, which does not have the underhood bracing to mate up to an A12 air cleaner. From what I can determine, none of the big names in the fiberglass hood market make a true reproduction lift-off hood.
There is an outfit listing a repop hood on eBay that looks nice, but I've been reluctant to pull the trigger on it due to quality concerns and lack of legitimate buyer feedback.
If you want to use an A12 air cleaner your options are, to the best of my knowledge, an original hood or the long-discontinued Year One hood. I believe that this is where MarkyMopar's hood derives it's value.