Here's a fix on How we did it cause it seems there is no other way to change sprites of an object dynamically:
for example we have several profile pictures (like 100) and we want to set them dynamically based on how many results found. all you need to do is set a max amount for your skins (100) and create empty frames for your sprite.then load the sprite image from URL and assign it to different frames, then address the frames in order to show them.
hope it helps causes it almost took like 10 days to solve this issue hope it saves some time for you too.
take care:)