Some background on this:
Amazon officially stopped supporting Active Content, and no longer offers the Kindle Store offerings on new devices.
But it took them a while to actually rip out the support from the firmware, something they seem to finally have done with the Oasis. (KUAL no longer runs on the Oasis. Fortunately, it has just now been ported to a Booklet in response.)
Just because Amazon won't let you download it, doesn't mean it won't work
and KUAL has no Amazon-like
download restrictions.