Yes. Try a Warped Sports Barrel set, the Lucky 15. I just got one, and they do a small, medium and large bore set of 3 barrels. They are awesome. Shoot straight and they are light as well. Cant go wrong.
They are the nuts though. Maybe if you advertised in the classifieds someone will have one for sale. The Timmy's se the same threads as the cockers do, so here should be a few out there.