Ok this is what I can think of off the top of my head, and I am sure there are more out there. Of course you have all the Cubs out there and you can modify them or you can buy kits for the L-4 also, and you can modify the J-3 to become a clipped wing cub. Wendell Hostetler makes plans for a PA-15 Vagabond. Ikon N'wst makes a Super Cub and a Tri-Pacer, which you could also convert to a Pacer. Jack Stafford Models has a Commanche and a Twin Commanche. Model Airplane News has plans for a Seneca and may have some for a PA-28 also. Hanger 9 makes a Charokee arf. Someone makes a 1/2A charokee also. I can't think of any others off the top of my head, but If I think of one I will let you know. What aircraft are you intrested in? Do you want a Charokee or something similar or are you looking for an older piper model?