I have a 06 Pathfinder and I want to inspect the transmission filter and magnets after 127k miles. Nissan wanted 45 for just the gasket and eBay wants 30 for it. Is this thing using gold to seal it??? I've seen rubber gaskets at Napa for around 5 bucks would these work? Can I reuse the old one? Or can I just use some red high heat rtv silicone gasket maker by permatex? The OEM gasket is thin so I don't think it's used for a clearance in the pan.