Those aren't the rubber ones I'm sure he's looking for.
The mopar market is SO small that it would have to be a loss leader to make molded rubber gaskets. I look at all the sheet metal being reprodsuced and my jaw hits the floor. unless the goal is to get to the point to make WHOLE bodies the numbers just don't make sense.
Back to the rubber gaskets, wish there was a 3D stereo lithography machine that could crank out real, rubber gaskets. There is a machine that will make rubber prototype parts (see picture below of a REALL black 3D rubber extrusion sample) but the are intended to demonstrate say a rubber grip on a drill motor handle. Not something that can be used in a real world application.
There is also the room tempoerature vulcanizing rub ber. A guy named Gary Goers makes rubber gaskets for 50's and 60's Mopars. I have to hand it to him that he's trying but the stuff looks like poo and deteriorates in the sunlight/UV in a VERY short time.
I looked into having 67-69 Barracuda taillight rubber gaskets made and the tooling alone is thousands - even Chinesse tooling. THEN you have to take delivery of say 100 pairs MINIMUM. One thing to keep in mind would be shipping/import costs. Then to have a place and SPACE to keep 1000 pairs which would be a 10+ yaer supply for 10+ years! Lastly I'd have to charge $100/pr and it would still probably take YEARS just to break even. THAT would be a foolish business model. And unfortunately the early Barracuda's would have a fraction of the 67-69 volume.