I've always used Symbiotics Colostrum powder, as it seems it is a good product at an affordable price.
Personally I found glutamine counterproductive, because of its relation to ammonia. I replaced it with OKG (Ornithine alpha-Ketoglutarate), which is a glutamine precursor and actually an ammonia scavenger.
I used to make a shake, taken twice daily, very similar to what you recommend made of: