I'm not at my truck to look, but I believe front and rear top plates are the same? I bought a set of top plates for my front springs from one of the classic truck vendors.
https://www.classicperform.com/Store...s/4754DATP.htm
It looks like EBAY has a original fronts listed right also.
https://www.ebay.com/itm/27606310967...evt=1&mkcid=28