F7R710 ENGINE REBUILD

[Geokor]

Hi guys , so for those that are following my recent posts i finally disassembled my f7r engine to check the condition of it , and unfortunately its not in the best shape that i wished for ....the damage the motor has its from a money shift that send the engine revving a lot higher than it should and as a result my valves touched the pistons , but havent bend at all. The other problem is that the pistons has seized and i have measured them at 82.5mm instead of 82.655 that renault states them, i will post also some photos for you to check. Also there is some damage on the camshaft as you will see on the pics. Fortunately the cylinders are in good shape no cracks or ovals and no marks inside. Crankshaft also in good condition since no wear at the bearings. So i am in search for pistons , 99.9% in stock diameter i will know for sure on monday , but the only thing i can find is forged ones , do you know anywhere i can find oem pistons ? Even in larger diameter . The other question is if i go for forged pistons what else should i upgrade , to make them work ? Will i need any trimetalic gasket , such as cometic , or anything else that i am not thinking of ? The plan for the motor was to make it fresh and put some reprofile cams , an aluminum pulley and a slightly lighter flywheel , balance the crankshaft and put it back in, no crazy power numbers . Any info appreciated !