Megumi
OG
You can only transmog your BoA gear to items that have no level requirement. (i.e. quest obtained gear, a few crafted items)
It's the same method as before: Send the BoA to your main (or any high level character of yours), keep the item equiped and then transmog it to the desired look. Then while it is still equiped, quickly send the BoA to your twink. Sometimes it may not work, but don't give up! If you send gold, it may help your success rate. Helms and cloaks (375g to mog) will fail more often. Once you get it, it'll stay and will not disappear.
Here's an example:
http://www.wowhead.com/item=12757
It's the same method as before: Send the BoA to your main (or any high level character of yours), keep the item equiped and then transmog it to the desired look. Then while it is still equiped, quickly send the BoA to your twink. Sometimes it may not work, but don't give up! If you send gold, it may help your success rate. Helms and cloaks (375g to mog) will fail more often. Once you get it, it'll stay and will not disappear.
Here's an example:
http://www.wowhead.com/item=12757