Egg protein shakes are available! I believe Met-RX makes one.
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.
Have you tried hemp protein powder? You can find it at Vitacost.com
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!
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.