0.0.19a_04 and 0.0.20a_02 were found!!!
From The Lost Media Wiki
0.0.19a_04 and 0.0.20a_02 Has been found recently and it is on the internet archive https://archive.org/details/Minecraft-JE-Classic
0.0.19a_04 and 0.0.20a_02 Has been found recently and it is on the internet archive https://archive.org/details/Minecraft-JE-Classic