If it's a cassock, there are hardly any. You can only take ordinary robes without attributes.

You can buy ordinary clothes in the brocade shop in Dugu City, or in other cities.

If you think the clothes of passers-by look good, kill and strip them, and be careful not to get rewards.

I remember that when the Brotherhood finally assassinated the emperor, it wore a beautiful robe that could be stripped off, and there seemed to be another one on board.

The Moso embassy should have a Moso robe with a whiteboard, and it is also in good shape.

I don't remember gray beard's robe. If you don't object to using the console, you save the file. Kill the gray beard and see if the robe on him has any attributes. If not, write down the code (if you don't understand it, you can throw it on the ground and read it after the console). After reading the file, you can add items yourself. Basically, you can do that with any equipment you like.