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You can repair the oil pan stripped drain bolt hole. Buy a Ford 18mm spark plug insert kit, it includes taps required. Only Ford, all others have tapered seats, the Ford has the necessary flat mating surface. Also buy a Toyota oil drain plug, they are 18mm. Drill and prep the worn out oil pan insert location, apply the spark plug insert with included sealant. Use the Toyota plug with some lube to install and torque the insert. Let cure, remove the Toyota plug, add a Toyota drain seal gasket [I usually coat them with Permatex number 1 sealant], insert, enjoy.
You cannot just replace the helicoil insert. The original insert is "SAE semi-finished" thread. Doesn't exist in the real world. It's like a straight, non tapered, pipe thread.
I repaired my RL411 oil pan this way 30 years ago, it still works and doesn't drip or leak.