So i found a way to Transmog BoAs and send them through the mail so they keep there appearance. This is good if you want to make your level 1 or something looking like a level 60+
How to do it:
1. Put the BoA you want to transmog and the item on your main (Or whoever is high enough to use that high level item)
2. Equip the Boa, and do the normal transmogrification.
3. Go to a mailbox, and then drag the item into the mail, (dont take from backpack!)
4. Go on alt and wear new gear.
If it doesnt work the first time you may need to try again, but it should work. MAKE SURE YOU DRAG THE ITEM IN THE MAILBOX AND NOT CLICK ON IT TO PUT IT IN.
I suggest you try with the shoulders and chest first to see if it work for you because to transmog the head it cost like 300+ gold.