I made gust locks for elevators, ailerons, and rudder from spare aluminum and a couple other things I had laying around in the hangar that are very effective and quite small (all 3 will fit in a sandwich size ziplock bag). They solidly hold all control surfaces in their faired positions. I would put a picture here, but Oshkosh will be over before I figured out how, so just come by homebuilt camping and have a look. I'm sure there are similar ones there as well. I actually have a spare rudder lock I'll give to anyone who wants it (first come first served).... had enough extra pieces to make two....
Scott Hersha
RV-8 Fastback
N184SB