Of course, fruit n veg is always the best path to take in the interests of ones health, but I'm specifically after muscle building/protein based things, I can't see what the greengrocer can really do for me in this case.
Ok point taken (chickpeas, nuts and lentils are pretty good though), but you could always pop next door to the fishmongers. Or the other way to the butchers. (Well you can if you live in a proper village).
In all honesty, I suspect that you're worried about protein showing up in your urine because of the amount of protein in your diet/supplementation.
It doesn't quite work how you'd logically think. For excessive protein to show in your urine, (not just a trace), your kidney's usually have to be well and truly f*cked.
A blood test is far more sensitive, if you want to check how they're doing. But of course, the CAA don't routinely do that.