Fresh green peppercorn
I've seen jars of green peppercorns on the stem. They're not in oil, and the pickling seems extremely mild if that's how they're preserved. I think I got them at the House of Spice on Augusta, and the price per jar was fractional of the price for the expensive little cans.
Susur used to use fresh pepper berries in some presentations, if the above won't work, you might give them a shout to ask their sources.