ok, here's the "try your luck" trick :
as for an example, the latest code for Mando is 1.02 and available on their site with this link :
https://f002.backblazeb2.com/file/gamecode/mando_le-1_02_0.spk.zip
mainly, STERN didnt erase previous codes, than right here, if you are looking for Mando 1.01 version, just try to simply change the "2" in the link with a "1"...
like this : https://f002.backblazeb2.com/file/gamecode/mando_le-1_01_0.spk.zip
in this case, works !!!
of course, its not always perfect/easy as it, you may have to try more combinations, playing/changing/trying characters, depending on how they called the file you are looking for...