There are a lot of Cessna 172 foamie and balsa ARF's some of which are light enough and fly well. Pat Tritle's C-172 short kit is designed for very light weight and can fly slow and scale like if that is important to you. There is a build thread on RCG E-Zone Scale Electric Plane forum.
PS: This is one of Pat's simpler designs and should be an easy build followiing his build thread and contacting him by e-mail for help if needed. These "short kits" have large plan sheets that must be reviewed carefully before you start and you must plan detailed assembly steps so that you dion't have to undo and redo things in proper order. The plans plus the build thread desciptions and photos plus Pat's building tips on his website should be the equivalent of detailed plans and instructions you'd find in an expensive complete kit. His buildng tips include covering, gluing and finishing wheel pants, etc, etc. Your biggest challenge is finding covering, accessory items, and necessary supplies and materials, etc. If you build one short kit sucessfully you will be able to build them all successfully. There is no thrill like the maiden flight of a model that you have built, covered, decorated, and adjusted yourself. If built straight and balanced and powered correctly they fly beautifully and scale like.
Here are a couple of pics of my Tritle Stinson Reliant short kit bash. His protype weighed 28 oz, mine weighs 52 oz with complete detailed panelled cabin, major modifications including operating doors, inlayed nose and cabin area, etc.etc, Mine has to fly a little faster but handles well. Most of Pat's lightweights can handle some added detail without losing flight performance.