Hi BuntyK,
I have a save just after the tiled floor, and George has the plate. Unfortunately I don't have anything later than that so you'll have to do the Machine puzzle and see-saw puzzles again I'm afraid. But I hope this helps; at least you won't have to restart
(download the attached 0.zip ands unzip it; it includes a file called 0.bss which is the save game and should go into your Broken Sword save game directory. It'll replace whatever is in the 1st slot in the save game list at the moment. If you DON'T want to replace the 1st save game change the number of the file. Eg: Change the name to 10.bss so that it takes slot 11 instead)
Hope that helps and enjoy the rest of the game