Well, I can't really get any stones from my white forest. The pokéballs found there are random and they usually just carry junk items, like... Pokéball! :P But I do have loads of berries (I go to the Dream World a lot), almost every type, so if you're interested in some, I probably have them.
As for the timezones I just went to The World Clock and it seems like I'm five hours ahead of you. (EDT, right?)
You say you're usually around between 2.30 and 4 (pm, right?), then I'll meet you here at 8.30 pm GMT, which is 3.30 EDT. I hope I'm not messing this up, it's late and I'm tired so I might not be functioning 100% :P
Or else tell me what's a good time for you to trade. I'm can't trade between 7 and 8.30 pm.