Did you build yours? None of the RV-4's have match drilled anything, and a rudder from another builder may not fit well, if at all. Not sure the extent of your damage (I have been down that road), but the new skin from Vans is not very expensive in .016 or .020. Your existing spar and upper/lower ribs could be re-used, and are already matched to your vertical hinges. Shouldn't take more than a weekend to do.
41 Aeronca 65TC Defender
8A7 / Advance NC