D&L Designs has a couple of offerings that would fit the bill for a 30cc engine. These planes are definetly "builders kits" and would be above my skill set to attempt to build without a couple more kits under my belt. But, if I had the skill set, this would be my choice... Also, since most replace the supplied hardware in traditional kits, you are not paying for stuff you're not going to use anyway.

http://www.dldesigns.net/cap231a.htm