From my experience in grocery stores, you should be saying "I don't want to buy anything that is sold in grocery stores." You won't find something worth using in most grocery stores (or any that I've found).
The truth is, it's much cheaper to buy protein from a website than from any store. Whey hydrolysate tastes like total crap (except for Surge, which tastes really good, like angel food cake), so I'd recommend whey isolate. It isn't as good a choice, but it will work. Mix with high-GI carbs (1:2 protein:carbs) such as malto or dextrose, and mix with water. 25g of protein and 50g of carbs is about right.
What protein do you take? I personally take a custom blend with micellar casein that I feel is probably close enough to Grow! but is a bit cheaper. If I could afford it though, I'd go with Grow! Does yours have micellar casein?
Also, don't take a slow protein such as casein post-workout. The faster, the better. Whey hydrolysate is best, then whey isolate, etc. Throw in some BCAAs too.
Whey hydrolysate, glucose, maltodextrin, BCAAs. And that delicious flavoring.
This is a terrible way to think. "Nobody else at my gym uses free weights so I'm sure they aren't the only way to work out. Can someone recommend a routine with only machines?" Of course it's not the only thing possible, but it's the best on the market.
They've been making helpful suggestions, but you decided you wouldn't listen from the beginning. You don't HAVE to get Grow! and Surge, but you won't find anything in a grocery store that will even come close. GNC is too expensive, so is The Vitamin Shoppe. Any health food store is bound to only have stuff loaded with soy (not good). You're stuck with ordering online unless you have the spare change to blow at GNC. Doesn't have to be Biotest products, but do your research so you can come up with at least a reasonable facsimilie.