Well, apparently some memory sellers don't know that, since several of them have lumped the 20L0243 in together with the others, as in my links above.
It looks like Kingston has a version of the right module, though: checking its site reveals that it has a replacement module for the 20L0243 that it catalogs as
KTM-Z50/32. Can't seem to track that one down anywhere either
(though the search did point me toward some familiar territory [see my avatar], since KTM is an Austrian dirt bike maker, and Honda has a minibike called the Z50
).