The ship Palmyra was built at the Robert Steele Company on the River Clyde, Scotland.
What research have you conducted so far? Would not want to pass along knowledge you already have and thus wade through your emails.
https://www.clydeships.co.uk/view.php?a1Dir=DESC&a1Page=352&ref=21856&vessel=PALMYRA
Earl Grey (1835 Ship): A British merchant sailing ship built in Newcastle upon Tyne that famously completed four convict transport voyages to Australia.
https://www.clydeships.co.uk/view.php?a1PageSize=50&of=&a1Page=58&ref=57774&vessel=EARL+GREY
https://earlgreysfamineorphans.wordpress.com/tag/earl-grey-and-thomas-arbuthnot-voyages-compared/
From what I am seeing, Earl Grey was a typical sailing ship resembling the Cutty Sark and other such .
https://www.clydeships.co.uk/view.php?ref=5627
Compare the photo with other clipper ships, if your desire is to build a bookshelf model, then built a model of a clipper & add the name plate desired ship name.
https://ehive.com/collections/3906/objects/1007248/cutty-sark-general-arrangement-sail-and-rigging-plans
Looking at the Earl Grey Mizzen Mast, just remove the yard arms from the Cutty Sark. Also 1 less yard arm from the Main mast.
The Thermopylae in its later years reduced the sail square yardage. It removed the Mizen yard arms too.
Look at the life boat located on the Earl Grey and the Cutty Sark or the Thermopylae cutter.
https://jamesbaybeacon.ca/?q=node/1470
Here in these photos we can clearly see the reduced canvas being carried by the Thermopylae on the Mizen .