NOW do an egg white protein powder but I can't vouch for it.
The vitaminshoppe carries a good selection of Healthy N Fit Nutritionals Egg White Protein:
Search Results - VitaminShoppe.com
They also carry hemp, vegetable and pea protein powders:
Category: Vegetable Protein - VitaminShoppe.com
I've heard good things about Jay Robb although I haven't tried it myself:
https://www.jayrobb.com/ShoppingCart...Y&prodid=14461
GNC do have egg protein - it comes in chocolate and vanilla:
GNC - Optimum Nutrition 100% Egg Protein - Chocolate "A serving of 100% Egg Protein contains the nutritional equivalent of seven egg whites".
Rice protein powder might be worth looking at too - just search Google and it'll bring up.
Have you looked into soy protein powder? There are some excellent non-GMO's out there.
Apart from meat and fish, edamame, soy beans/chips, peas, nuts, hummus, etc. etc., all contain a reasonable level of protein