You might try seeing if SOR has a replacement gasket for that. Or you could try scraping it off and use a generic carburetor gasket material cut to the right shape and see if it works. Generally you're not supposed to mess with that insulator plate, but in your case it's too late. There's lots of engines being parted out which you could grab a replacement off of too, if needed.
"Stay the Trail," "Tread Lightly," and "Leave No Trace" ethics
Rising Sun Bio
2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering,
soon to lose the Sanden OBA
to go back to factory emissions
Limited TRD 2UZ-FE FOR SALE SOON
Up next: Something that makes a funny whistling noise...