You are doing an amazing job. Take a look at my 1940 160 trunk here:
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=5878&viewmode=flat&order=ASC&type=&mode=0&start=10 After all this work was done to mine to make it solid again and rebuild the supports (looks like Frankenstein next to what you are doing) I found out about Classic 2 Current Fabrication. They had 1940 120 pans. I never did find out if the 120 and 160 trunks are identical. Now it seems what they have is reversed.
They show a Super 8 convertible coupe pan, '38-'40 for $99.
This is what they show for 1940. When I searched 5 years ago, they had 120, but not Super 8, so maybe there's some confusion. But might be worth a call to see if they have anything that would help you. It surprises me that they have so much for the 110, but not 120. But with your talent, you could modify what they have easily.
http://www.c2cfabrication.com/collections/all/packard+1940
Joe
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