Try hemp, pea, etc. Go to your local health food store (health food is loosely used here though, a lot of the products are not all that healthy) and see what they have. Do some research to make sure there aren’t any issues with the product.
We use VEGA in our household. It is a combination of pea sacha inchi protein, sprouted whole grain brown rice protein, and alfalfa protein. Hemp is a great choice too!
Advocare has vegetarian meal replacement drink. Here’s a link:https://www.advocare.com/10058674/Store/ItemDetail.aspx?itemCode=T2151&id=A&flavor=h Or any other protein shake that is plant based.