If you mean not currently available I can get you version exclusives from white if you want, or pokemon foreign to the region. I only ask for the trade because for some reason that particular swarm just will not show up haha. I have had an offer but it might take them some time too My logic is I'll trade with whoever has one first.
Has anyone offered on the Wynaut yet? I ask because if you're in the post-E4 they are available to you on Route 2 - again, only after beating the E4, and only when the bulletin board notifies of a swarm there. Level is an easy fix; grab a Lv.51 or Lv.52 Pokémon, a Quick Ball, and a few Repels (to be safe), and the rest is elementary unless it doesn't go in the ball (in which case bring out something with False Swipe and, uh, encourage it to go in the next ball).
If nothing else, I can try to catch one for you. Do you have anything not currently available in Black or White? I'm on a Pokédex completion mission. White Forest exclusives will also suffice if you have them. If you play Black, meanwhile, we won't worry too much about it as I have everything there.