HP48 application cards image sharable (downloadable)?

[gege]

Many (if not all) rom modules for the HP41 are freely available for download, especially useful with the Clonix/NoV module.
It's not easy to find images of HP48 cards to load into a memory card, why?
Personnaly I don't use these cards, it's for fun and collection.
You can buy application cards on ebay but at a very high price.
Is it because it's not legal? (I think it is not more legal than the images of the modules for HP41).
Is it because nobody want to share?