Tabs? There is exactly ONE "tab" on an RX side panel, and if you break it off, don't worry about it. The hood will hold it on for you.
If you really want a tab though... drill out the original tab so its a HOLE, about 3/8", then get yourself a big headed 1/4" bolt and JB weld. Mix up a blob of JB weld and dip the end of the bolt into it (to make the tip of the bolt THICKER, like the tab). When that hardens, hold up the panel and push the bolt through the hole.