Joharah has Isis wings on sale for about $75.00. They look good on their web site. Karolinka is pretty good about stating any naturally-occuring inconsistencies or flaws in the wings. I have ordered from them before and had a good experience. I would recommend them.
Little Egypt sells Isis Wings and I have seen them in person and they look good. The dowels that they put in their wings are extremely heavy. I think the lightweight ones are better. Dahlal also sells them. I would go with any reputable vendor and you would probably be fine.
www.dahlal.com; www.audrena.com; www.joharah.com.
www.littleegypt.com