Tape found, few images from tape available.
From The Lost Media Wiki
This account says they have found an original recording of the special through a cousin and the voice actress of Doraemon during this period. Apparently, the cousin called them on Dec. 16th to see if they can make a dub of the recording, and on another tweet made on the 29th, they have received the tape.
A few images from the recording is on this twitter post: https://twitter.com/VHSLOVEVHS/status/1740943762048913713
Dec. 16th post: https://twitter.com/VHSLOVEVHS/status/1735967257426366479
This special is extremely close to becomming available to see once more years after.