You might try EMS in Ohio. They make the repo tail pans and tool trays. Another source may be Howell Sheetmetal in Texas. Also try Direct Sheetmetal in California. All should have websites.
Hi, pretty certain that 37 & 38 sedan base panel should be the same, if not lenghten it or shorten it a tad. the striker plate itself was also unique to those 2 years in sedans & coupes, as were the latches i rekon .